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Detect llvm-gcc and set appropriate flags

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Originally committed as revision 25028 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-09-02 21:41:07 +00:00
parent 5c8ef670e7
commit 613a4e3f6d
1 changed files with 14 additions and 3 deletions
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17
configure vendored
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@ -1799,7 +1799,16 @@ filter_cflags=echo
filter_cppflags=echo
filter_asflags=echo
if $cc -v 2>&1 | grep -qi ^gcc; then
if $cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
cc_type=llvm_gcc
cc_version=__VERSION__
gcc_extra_ver=$(expr "$($cc --version | head -n1)" : '.*\((.*)\)')
cc_ident="llvm-gcc $($cc -dumpversion) $gcc_extra_ver"
CC_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
AS_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
speed_cflags='-O3'
size_cflags='-Os'
elif $cc -v 2>&1 | grep -qi ^gcc; then
cc_type=gcc
cc_version=__VERSION__
gcc_extra_ver=$(expr "$($cc --version | head -n1)" : '.*\((.*)\)')
@ -1969,7 +1978,7 @@ add_asflags $extra_cflags
if test -n "$sysroot"; then
case "$cc_type" in
gcc)
gcc|llvm_gcc)
add_cppflags --sysroot="$sysroot"
add_ldflags --sysroot="$sysroot"
;;
@ -1988,7 +1997,7 @@ if test "$cpu" = host; then
enabled cross_compile && die "--cpu=host makes no sense when cross-compiling."
case "$cc_type" in
gcc)
gcc|llvm_gcc)
check_native(){
$cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
sed -n "/$1=/{
@ -2876,6 +2885,8 @@ elif enabled gcc; then
check_cflags -fno-tree-vectorize
check_cflags -Werror=implicit-function-declaration
check_cflags -Werror=missing-prototypes
elif enabled llvm_gcc; then
check_cflags -mllvm -stack-alignment=16
elif enabled clang; then
check_cflags -mllvm -stack-alignment=16
check_cflags -Qunused-arguments