mirror of
https://github.com/webmproject/libwebp.git
synced 2024-11-19 20:08:28 +01:00
Make it possible to avoid automagic dependencies
See https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Automagic_dependencies for more info. This patch makes it possible to request several dependencies not to be used even if they are present on the system. Change-Id: Ib32f60c001ade01eda3e89463279725ee4243ca2
This commit is contained in:
Paweł Hajdan, Jr
James Zern
parent
c741183c10
commit
73a304e953
359
configure.ac
359
configure.ac
@ -32,7 +32,8 @@ AC_ARG_WITH([pkgconfigdir], AS_HELP_STRING([--with-pkgconfigdir=DIR],
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AC_SUBST([pkgconfigdir])
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dnl === TEST_AND_ADD_CFLAGS(flag)
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dnl === Checks whether $CC supports 'flag' and adds it to AM_CFLAGS on success.
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dnl === Checks whether $CC supports 'flag' and adds it to AM_CFLAGS
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dnl === on success.
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AC_DEFUN([TEST_AND_ADD_CFLAGS],
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[SAVED_CFLAGS="$CFLAGS"
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CFLAGS="-Werror $1"
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@ -111,207 +112,235 @@ fi
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AC_MSG_NOTICE([checking if threading is enabled... ${enable_threading-no}])
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dnl === check for OpenGL/GLUT support ===
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CLEAR_LIBVARS([GL])
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WITHLIB_OPTION([gl], [GL])
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LIBCHECK_PROLOGUE([GL])
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AC_ARG_ENABLE([gl], AS_HELP_STRING([--disable-gl],
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[Disable detection of OpenGL support
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@<:@default=auto@:>@]))
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AS_IF([test "x$enable_gl" != "xno"], [
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CLEAR_LIBVARS([GL])
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WITHLIB_OPTION([gl], [GL])
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glut_cflags="none"
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glut_ldflags="none"
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case $host_os in
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darwin*)
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# Special case for OSX builds. Append these to give the user a chance to
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# override with --with-gl*
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glut_cflags="$glut_cflags|-framework GLUT -framework OpenGL"
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glut_ldflags="$glut_ldflags|-framework GLUT -framework OpenGL"
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;;
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esac
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LIBCHECK_PROLOGUE([GL])
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GLUT_SAVED_CPPFLAGS="$CPPFLAGS"
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SAVED_IFS="$IFS"
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IFS="|"
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for flag in $glut_cflags; do
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# restore IFS immediately as the autoconf macros may need the default.
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IFS="$SAVED_IFS"
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unset ac_cv_header_GL_glut_h
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unset ac_cv_header_OpenGL_glut_h
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case $flag in
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none) ;;
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*) CPPFLAGS="$flag $CPPFLAGS";;
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glut_cflags="none"
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glut_ldflags="none"
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case $host_os in
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darwin*)
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# Special case for OSX builds. Append these to give the user a chance to
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# override with --with-gl*
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glut_cflags="$glut_cflags|-framework GLUT -framework OpenGL"
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glut_ldflags="$glut_ldflags|-framework GLUT -framework OpenGL"
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;;
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esac
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AC_CHECK_HEADERS([GL/glut.h GLUT/glut.h OpenGL/glut.h],
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[glut_headers=yes;
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test "$flag" = "none" || GL_INCLUDES="$CPPFLAGS";
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break])
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CPPFLAGS="$GLUT_SAVED_CPPFLAGS"
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test "$glut_headers" = "yes" && break
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done
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IFS="$SAVED_IFS"
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if test "$glut_headers" = "yes"; then
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AC_LANG_PUSH([C])
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GLUT_SAVED_LDFLAGS="$LDFLAGS"
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GLUT_SAVED_CPPFLAGS="$CPPFLAGS"
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SAVED_IFS="$IFS"
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IFS="|"
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for flag in $glut_ldflags; do
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for flag in $glut_cflags; do
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# restore IFS immediately as the autoconf macros may need the default.
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IFS="$SAVED_IFS"
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unset ac_cv_search_glBegin
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unset ac_cv_header_GL_glut_h
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unset ac_cv_header_OpenGL_glut_h
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case $flag in
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none) ;;
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*) LDFLAGS="$flag $LDFLAGS";;
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*) CPPFLAGS="$flag $CPPFLAGS";;
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esac
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# find libGL
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GL_SAVED_LIBS="$LIBS"
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AC_SEARCH_LIBS([glBegin], [GL OpenGL])
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LIBS="$GL_SAVED_LIBS"
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# A direct link to libGL may not be necessary on e.g., linux.
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GLUT_SAVED_LIBS="$LIBS"
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for lib in "" "-lglut" "-lglut $ac_cv_search_glBegin"; do
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LIBS="$lib"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([
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#ifdef __cplusplus
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# define EXTERN_C extern "C"
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#else
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# define EXTERN_C
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#endif
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EXTERN_C char glOrtho();
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EXTERN_C char glutMainLoop();
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],[
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glOrtho();
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glutMainLoop();
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])
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],
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AC_DEFINE(WEBP_HAVE_GL, [1],
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[Set to 1 if OpenGL is supported])
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[glut_support=yes], []
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)
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if test "$glut_support" = "yes"; then
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GL_LIBS="$LDFLAGS $lib"
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break
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fi
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done
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LIBS="$GLUT_SAVED_LIBS"
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LDFLAGS="$GLUT_SAVED_LDFLAGS"
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test "$glut_support" = "yes" && break
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AC_CHECK_HEADERS([GL/glut.h GLUT/glut.h OpenGL/glut.h],
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[glut_headers=yes;
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test "$flag" = "none" || GL_INCLUDES="$CPPFLAGS";
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break])
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CPPFLAGS="$GLUT_SAVED_CPPFLAGS"
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test "$glut_headers" = "yes" && break
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done
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IFS="$SAVED_IFS"
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AC_LANG_POP
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fi
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LIBCHECK_EPILOGUE([GL])
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if test "$glut_headers" = "yes"; then
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AC_LANG_PUSH([C])
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GLUT_SAVED_LDFLAGS="$LDFLAGS"
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SAVED_IFS="$IFS"
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IFS="|"
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for flag in $glut_ldflags; do
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# restore IFS immediately as the autoconf macros may need the default.
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IFS="$SAVED_IFS"
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unset ac_cv_search_glBegin
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if test "$glut_support" = "yes" -a "$enable_libwebpdemux" = "yes"; then
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build_vwebp=yes
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fi
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case $flag in
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none) ;;
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*) LDFLAGS="$flag $LDFLAGS";;
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esac
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# find libGL
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GL_SAVED_LIBS="$LIBS"
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AC_SEARCH_LIBS([glBegin], [GL OpenGL])
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LIBS="$GL_SAVED_LIBS"
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# A direct link to libGL may not be necessary on e.g., linux.
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GLUT_SAVED_LIBS="$LIBS"
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for lib in "" "-lglut" "-lglut $ac_cv_search_glBegin"; do
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LIBS="$lib"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([
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#ifdef __cplusplus
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# define EXTERN_C extern "C"
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#else
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# define EXTERN_C
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#endif
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EXTERN_C char glOrtho();
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EXTERN_C char glutMainLoop();
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],[
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glOrtho();
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glutMainLoop();
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])
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],
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AC_DEFINE(WEBP_HAVE_GL, [1],
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[Set to 1 if OpenGL is supported])
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[glut_support=yes], []
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)
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if test "$glut_support" = "yes"; then
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GL_LIBS="$LDFLAGS $lib"
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break
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fi
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done
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LIBS="$GLUT_SAVED_LIBS"
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LDFLAGS="$GLUT_SAVED_LDFLAGS"
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test "$glut_support" = "yes" && break
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done
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IFS="$SAVED_IFS"
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AC_LANG_POP
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fi
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LIBCHECK_EPILOGUE([GL])
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if test "$glut_support" = "yes" -a "$enable_libwebpdemux" = "yes"; then
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build_vwebp=yes
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fi
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])
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AM_CONDITIONAL([BUILD_VWEBP], [test "$build_vwebp" = "yes"])
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dnl === check for PNG support ===
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CLEAR_LIBVARS([PNG])
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AC_PATH_PROGS(LIBPNG_CONFIG,
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[libpng-config libpng15-config libpng14-config libpng12-config])
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if test -n "$LIBPNG_CONFIG"; then
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PNG_INCLUDES=`$LIBPNG_CONFIG --cflags`
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PNG_PREFIX=`$LIBPNG_CONFIG --prefix`
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if test "${PNG_PREFIX}/lib" != "/usr/lib" ; then
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PNG_LIBS="-L${PNG_PREFIX}/lib"
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AC_ARG_ENABLE([png], AS_HELP_STRING([--disable-png],
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[Disable detection of PNG format support
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@<:@default=auto@:>@]))
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AS_IF([test "x$enable_png" != "xno"], [
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CLEAR_LIBVARS([PNG])
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AC_PATH_PROGS(LIBPNG_CONFIG,
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[libpng-config libpng15-config libpng14-config libpng12-config])
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if test -n "$LIBPNG_CONFIG"; then
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PNG_INCLUDES=`$LIBPNG_CONFIG --cflags`
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PNG_PREFIX=`$LIBPNG_CONFIG --prefix`
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if test "${PNG_PREFIX}/lib" != "/usr/lib" ; then
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PNG_LIBS="-L${PNG_PREFIX}/lib"
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fi
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PNG_LIBS="$PNG_LIBS `$LIBPNG_CONFIG --libs`"
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fi
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PNG_LIBS="$PNG_LIBS `$LIBPNG_CONFIG --libs`"
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fi
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WITHLIB_OPTION([png], [PNG])
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WITHLIB_OPTION([png], [PNG])
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LIBCHECK_PROLOGUE([PNG])
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AC_CHECK_HEADER(png.h,
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AC_SEARCH_LIBS(png_get_libpng_ver, [png],
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[test "$ac_cv_search_png_get_libpng_ver" = "none required" \
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|| PNG_LIBS="$PNG_LIBS $ac_cv_search_png_get_libpng_ver"
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PNG_INCLUDES="$PNG_INCLUDES -DWEBP_HAVE_PNG"
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AC_DEFINE(WEBP_HAVE_PNG, [1],
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[Set to 1 if PNG library is installed])
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png_support=yes
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],
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[AC_MSG_WARN(Optional png library not found)
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PNG_LIBS=""
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PNG_INCLUDES=""
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],
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[$MATH_LIBS]),
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[AC_MSG_WARN(png library not available - no png.h)
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PNG_LIBS=""
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PNG_INCLUDES=""
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],
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)
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LIBCHECK_EPILOGUE([PNG])
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LIBCHECK_PROLOGUE([PNG])
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AC_CHECK_HEADER(png.h,
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AC_SEARCH_LIBS(png_get_libpng_ver, [png],
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[test "$ac_cv_search_png_get_libpng_ver" = "none required" \
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|| PNG_LIBS="$PNG_LIBS $ac_cv_search_png_get_libpng_ver"
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PNG_INCLUDES="$PNG_INCLUDES -DWEBP_HAVE_PNG"
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AC_DEFINE(WEBP_HAVE_PNG, [1],
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[Set to 1 if PNG library is installed])
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png_support=yes
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],
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[AC_MSG_WARN(Optional png library not found)
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PNG_LIBS=""
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PNG_INCLUDES=""
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],
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[$MATH_LIBS]),
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[AC_MSG_WARN(png library not available - no png.h)
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PNG_LIBS=""
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PNG_INCLUDES=""
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],
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)
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LIBCHECK_EPILOGUE([PNG])
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])
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dnl === check for JPEG support ===
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CLEAR_LIBVARS([JPEG])
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WITHLIB_OPTION([jpeg], [JPEG])
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AC_ARG_ENABLE([jpeg],
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AS_HELP_STRING([--disable-jpeg],
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[Disable detection of JPEG format support
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@<:@default=auto@:>@]))
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AS_IF([test "x$enable_jpeg" != "xno"], [
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CLEAR_LIBVARS([JPEG])
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WITHLIB_OPTION([jpeg], [JPEG])
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LIBCHECK_PROLOGUE([JPEG])
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AC_CHECK_HEADER(jpeglib.h,
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AC_CHECK_LIB(jpeg, jpeg_set_defaults,
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[JPEG_LIBS="$JPEG_LIBS -ljpeg"
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JPEG_INCLUDES="$JPEG_INCLUDES -DWEBP_HAVE_JPEG"
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AC_DEFINE(WEBP_HAVE_JPEG, [1],
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[Set to 1 if JPEG library is installed])
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jpeg_support=yes
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],
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AC_MSG_WARN(Optional jpeg library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(jpeg library not available - no jpeglib.h)
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)
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LIBCHECK_EPILOGUE([JPEG])
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LIBCHECK_PROLOGUE([JPEG])
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AC_CHECK_HEADER(jpeglib.h,
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AC_CHECK_LIB(jpeg, jpeg_set_defaults,
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[JPEG_LIBS="$JPEG_LIBS -ljpeg"
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JPEG_INCLUDES="$JPEG_INCLUDES -DWEBP_HAVE_JPEG"
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AC_DEFINE(WEBP_HAVE_JPEG, [1],
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[Set to 1 if JPEG library is installed])
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jpeg_support=yes
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],
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AC_MSG_WARN(Optional jpeg library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(jpeg library not available - no jpeglib.h)
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)
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LIBCHECK_EPILOGUE([JPEG])
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])
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dnl === check for TIFF support ===
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CLEAR_LIBVARS([TIFF])
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WITHLIB_OPTION([tiff], [TIFF])
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AC_ARG_ENABLE([tiff],
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AS_HELP_STRING([--disable-tiff],
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[Disable detection of TIFF format support
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@<:@default=auto@:>@]))
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AS_IF([test "x$enable_tiff" != "xno"], [
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CLEAR_LIBVARS([TIFF])
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WITHLIB_OPTION([tiff], [TIFF])
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LIBCHECK_PROLOGUE([TIFF])
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AC_CHECK_HEADER(tiffio.h,
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AC_CHECK_LIB(tiff, TIFFGetVersion,
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[TIFF_LIBS="$TIFF_LIBS -ltiff"
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TIFF_INCLUDES="$TIFF_INCLUDES -DWEBP_HAVE_TIFF"
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AC_DEFINE(WEBP_HAVE_TIFF, [1],
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[Set to 1 if TIFF library is installed])
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tiff_support=yes
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],
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AC_MSG_WARN(Optional tiff library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(tiff library not available - no tiffio.h)
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)
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LIBCHECK_EPILOGUE([TIFF])
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LIBCHECK_PROLOGUE([TIFF])
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AC_CHECK_HEADER(tiffio.h,
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AC_CHECK_LIB(tiff, TIFFGetVersion,
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[TIFF_LIBS="$TIFF_LIBS -ltiff"
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TIFF_INCLUDES="$TIFF_INCLUDES -DWEBP_HAVE_TIFF"
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AC_DEFINE(WEBP_HAVE_TIFF, [1],
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[Set to 1 if TIFF library is installed])
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tiff_support=yes
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],
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AC_MSG_WARN(Optional tiff library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(tiff library not available - no tiffio.h)
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)
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LIBCHECK_EPILOGUE([TIFF])
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])
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dnl === check for GIF support ===
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CLEAR_LIBVARS([GIF])
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WITHLIB_OPTION([gif], [GIF])
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AC_ARG_ENABLE([gif], AS_HELP_STRING([--disable-gif],
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[Disable detection of GIF format support
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@<:@default=auto@:>@]))
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AS_IF([test "x$enable_gif" != "xno"], [
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CLEAR_LIBVARS([GIF])
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WITHLIB_OPTION([gif], [GIF])
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LIBCHECK_PROLOGUE([GIF])
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AC_CHECK_HEADER(gif_lib.h,
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AC_CHECK_LIB([gif], [DGifOpenFileHandle],
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[GIF_LIBS="$GIF_LIBS -lgif"
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AC_DEFINE(WEBP_HAVE_GIF, [1],
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[Set to 1 if GIF library is installed])
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gif_support=yes
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],
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AC_MSG_WARN(Optional gif library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(gif library not available - no gif_lib.h)
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)
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LIBCHECK_EPILOGUE([GIF])
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LIBCHECK_PROLOGUE([GIF])
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AC_CHECK_HEADER(gif_lib.h,
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AC_CHECK_LIB([gif], [DGifOpenFileHandle],
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[GIF_LIBS="$GIF_LIBS -lgif"
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AC_DEFINE(WEBP_HAVE_GIF, [1],
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[Set to 1 if GIF library is installed])
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gif_support=yes
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],
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AC_MSG_WARN(Optional gif library not found),
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[$MATH_LIBS]),
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AC_MSG_WARN(gif library not available - no gif_lib.h)
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)
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LIBCHECK_EPILOGUE([GIF])
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if test "$gif_support" = "yes" -a \
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"$enable_libwebpmux" = "yes"; then
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build_gif2webp=yes
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fi
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if test "$gif_support" = "yes" -a \
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"$enable_libwebpmux" = "yes"; then
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build_gif2webp=yes
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fi
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])
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AM_CONDITIONAL([BUILD_GIF2WEBP], [test "${build_gif2webp}" = "yes"])
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dnl === check for WIC support ===
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