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configure: add work around for gcc-4.9 aarch64 bug

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add -frename-registers to avoid:
src/dsp/dec_neon.c🔢1: internal
compiler error: in simplify_const_unary_operation, at
simplify-rtx.c:1539

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62040
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61622
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=757738

Change-Id: I52fb3a29ac30b82b27da05378bdb495ddebb97d7
This commit is contained in:
James Zern 2014-08-11 19:41:05 -07:00
parent dab702b357
commit e2b8cec05b
1 changed files with 13 additions and 0 deletions
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13
configure.ac
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@ -62,6 +62,19 @@ TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshadow])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused-but-set-variable])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wvla])
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62040
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61622
AS_IF([test "$GCC" = "yes" ], [
gcc_version=`$CC -dumpversion`
gcc_wht_bug=""
case "$host_cpu" in
aarch64|arm64)
case "$gcc_version" in
4.9|4.9.0|4.9.1) gcc_wht_bug=yes ;;
esac
esac
AS_IF([test "$gcc_wht_bug" = "yes"], [
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-frename-registers])])])
AC_SUBST([AM_CFLAGS])
dnl === Check for machine specific flags