From cbcff58ed670c8edc0be1004384cbe0fd07d8d26 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Wed, 5 Jul 2017 18:49:21 -0700 Subject: [PATCH 1/2] check for available arm optimizations Taken From http://sources.debian.net/src/mpeg2dec/0.5.1-7/debian/patches/65_arm-test-with-compiler.patch/ Upstream-Status: Pending Signed-off-by: Khem Raj --- configure.ac | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/configure.ac b/configure.ac index acdcb1e..2c0a721 100644 --- a/configure.ac +++ b/configure.ac @@ -59,7 +59,7 @@ elif test x"$GCC" = x"yes"; then AC_TRY_CFLAGS([$TRY_CFLAGS $CFLAGS],[OPT_CFLAGS="$TRY_CFLAGS"]) dnl arch-specific flags - arm_conditional=false + build_arm_opt=false case "$host" in i?86-* | k?-* | x86_64-* | amd64-*) AC_DEFINE([ARCH_X86],,[x86 architecture]) @@ -102,8 +102,12 @@ elif test x"$GCC" = x"yes"; then alpha*) AC_DEFINE([ARCH_ALPHA],,[alpha architecture]);; arm*) - arm_conditional=: - AC_DEFINE([ARCH_ARM],,[ARM architecture]);; + AC_LANG(C) + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([[ + void foo(void) { __asm__ volatile("pld [r1]"); }]])], + build_arm_opt=true; AC_DEFINE([ARCH_ARM],,[ARM architecture]), + build_arm_opt=false);; esac elif test x"$CC" = x"tendracc"; then dnl TenDRA portability checking compiler @@ -123,7 +127,7 @@ else esac fi -AM_CONDITIONAL(ARCH_ARM, ${arm_conditional}) +AM_CONDITIONAL(ARCH_ARM, test x$build_arm_opt = xtrue) dnl Checks for libtool - this must be done after we set cflags AC_LIBTOOL_WIN32_DLL -- 2.13.2