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configure: consolidate compiler-specific optimisation settings

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In the main per-compiler section, set speed_cflags and size_cflags
with suitable values.  Later one or the other is added to CFLAGS.

Originally committed as revision 21499 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-01-28 02:50:36 +00:00
parent b4f0e04c99
commit 14ca9cd0b0
1 changed files with 19 additions and 14 deletions
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33
configure vendored
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@ -1657,20 +1657,28 @@ if $cc -v 2>&1 | grep -qi ^gcc; then
CC_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
AS_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
fi
speed_cflags='-O3'
size_cflags='-Os'
elif $cc --version 2>/dev/null | grep -q Intel; then
cc_type=icc
cc_version="AV_STRINGIFY(__INTEL_COMPILER)"
CC_DEPFLAGS='-MMD'
AS_DEPFLAGS='-MMD'
speed_cflags='-O3'
size_cflags='-Os'
elif $cc -v 2>&1 | grep -q xlc; then
cc_type=xlc
cc_version="AV_STRINGIFY(__IBMC__)"
speed_cflags='-O5'
size_cflags='-O5 -qcompact'
elif $cc -V 2>/dev/null | grep -q Compaq; then
cc_type=ccc
cc_version="AV_STRINGIFY(__DECC_VER)"
DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -M'
debuglevel=3
add_ldflags -Wl,-z,now # calls to libots crash without this
speed_cflags='-fast'
size_cflags='-O1'
elif $cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
test -d "$sysroot" || die "No valid sysroot specified."
cc_type=armcc
@ -1685,6 +1693,8 @@ elif $cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
as_default="${cross_prefix}gcc"
CC_DEPFLAGS='-MMD'
AS_DEPFLAGS='-MMD'
speed_cflags='-O3'
size_cflags='-Os'
elif $cc -version 2>/dev/null | grep -q TMS470; then
cc_type=tms470
cc_version="AV_STRINGIFY(__TI_COMPILER_VERSION__)"
@ -1697,6 +1707,8 @@ elif $cc -version 2>/dev/null | grep -q TMS470; then
add_cflags -D__gnuc_va_list=va_list -D__USER_LABEL_PREFIX__=
CC_DEPFLAGS='-ppa -ppd=$(@:.o=.d)'
AS_DEPFLAGS='-MMD'
speed_cflags='-O3 -mf=5'
size_cflags='-O3 -mf=2'
filter_cflags=tms470_flags
tms470_flags(){
for flag; do
@ -1716,8 +1728,7 @@ elif $cc -version 2>/dev/null | grep -q TMS470; then
-mfpu=vfp) echo --float_support=vfpv2 ;;
-mfpu=vfpv3) echo --float_support=vfpv3 ;;
-msoft-float) echo --float_support=vfplib ;;
-Os) echo -O3 -mf=2 ;;
-O[0-3]) echo $flag -mf=5 ;;
-O[0-3]|-mf=*) echo $flag ;;
-g) echo -g -mn ;;
-pds=*) echo $flag ;;
esac
@ -1728,11 +1739,15 @@ elif $cc -v 2>&1 | grep -q clang; then
cc_version=__VERSION__
CC_DEPFLAGS='-MMD'
AS_DEPFLAGS='-MMD'
speed_cflags='-O3'
size_cflags='-Os'
elif $cc -V 2>&1 | grep -q Sun; then
cc_type=suncc
cc_version="AV_STRINGIFY(__SUNPRO_C)"
DEPEND_CMD='$(DEPCC) $(DEPFLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -xM1'
speed_cflags='-O5'
size_cflags='-O5 -xspace'
filter_cflags=suncc_flags
suncc_flags(){
for flag; do
@ -1761,7 +1776,6 @@ elif $cc -V 2>&1 | grep -q Sun; then
-std=c99) echo -xc99 ;;
-fomit-frame-pointer) echo -xregs=frameptr ;;
-fPIC) echo -KPIC -xcode=pic32 ;;
-Os) echo -O5 -xspace ;;
-W*,*) echo $flag ;;
-f*-*|-W*) ;;
*) echo $flag ;;
@ -2632,19 +2646,10 @@ test_ldflags -Wl,--version-script,$TMPV &&
append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
if enabled small; then
check_cflags -Os # not all compilers support -Os
add_cflags $size_cflags
optimizations="small"
elif enabled optimizations; then
if enabled xlc; then
add_cflags -O5
add_ldflags -O5
elif enabled suncc; then
add_cflags -O5
elif enabled ccc; then
add_cflags -fast
else
add_cflags -O3
fi
add_cflags $speed_cflags
fi
check_cflags -fno-math-errno
check_cflags -fno-signed-zeros