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configure: remove use of AS_VAR_APPEND

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This wasn't used often and benefits were likely minimal. Dropping it
outright is a bit simpler than adding a compatibility ifdef.

provides some compatibility with older versions of autoconf.
tested with autoconf 2.59/automake 1.7/aclocal 1.7

Change-Id: Ifed892346cf2329597985704830a96fc58d65607
This commit is contained in:
James Zern 2013-06-04 23:45:10 -07:00
parent 87a4fca25f
commit 9326a56f8d
1 changed files with 4 additions and 1 deletions
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5
configure.ac
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@ -40,7 +40,10 @@ AC_DEFUN([TEST_AND_ADD_CFLAGS],
dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])],
[AC_MSG_RESULT([yes])]
[AS_VAR_APPEND([AM_CFLAGS], [" $1"])],
dnl Simply append the variable avoiding a
dnl compatibility ifdef for AS_VAR_APPEND as this
dnl variable shouldn't grow all that large.
[AM_CFLAGS="$AM_CFLAGS $1"],
[AC_MSG_RESULT([no])])
CFLAGS="$SAVED_CFLAGS"])
TEST_AND_ADD_CFLAGS([-Wall])