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| author | Mans Rullgard <mans@mansr.com> | 2012-09-20 15:50:14 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2012-10-04 18:21:49 +0100 |
| commit | 65d12900432ac880d764edbbd36818431484a76e (patch) | |
| tree | 2f91bc8cd0fb57e2e39e43cad8161ac1c9d531f3 /configure | |
| parent | 54b243141e9ded3437f055d173272caa399a216e (diff) | |
| download | ffmpeg-65d12900432ac880d764edbbd36818431484a76e.tar.gz | |
configure: add --enable-lto option
This works with gcc. Other compilers might need to have a flag
mapping added.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 38 |
1 files changed, 27 insertions, 11 deletions
@@ -238,6 +238,7 @@ Advanced options (experts only): disable buffer boundary checking in bitreaders (faster, but may crash) --enable-memalign-hack emulate memalign, interferes with memory debuggers + --enable-lto use link-time optimization Optimization options (experts only): --disable-asm disable all assembler optimizations @@ -1290,6 +1291,7 @@ CMDLINE_SELECT=" debug extra_warnings logging + lto optimizations " @@ -3445,17 +3447,31 @@ void ff_foo(void) {} EOF fi -if [ -n "$optflags" ]; then - add_cflags $optflags -elif enabled small; then - add_cflags $cflags_size -elif enabled optimizations; then - add_cflags $cflags_speed -else - add_cflags $cflags_noopt +if [ -z "$optflags" ]; then + if enabled small; then + optflags=$cflags_size + elif enabled optimizations; then + optflags=$cflags_speed + else + optflags=$cflags_noopt + fi fi -check_cflags -fno-math-errno -check_cflags -fno-signed-zeros + +check_optflags(){ + check_cflags "$@" + enabled lto && check_ldflags "$@" +} + + +if enabled lto; then + test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker" + check_cflags -flto + check_ldflags -flto $cpuflags +fi + +check_optflags $optflags +check_optflags -fno-math-errno +check_optflags -fno-signed-zeros if enabled icc; then # Just warnings, no remarks @@ -3490,7 +3506,7 @@ elif enabled ccc; then add_cflags -msg_disable ptrmismatch1 add_cflags -msg_disable unreachcode elif enabled gcc; then - check_cflags -fno-tree-vectorize + check_optflags -fno-tree-vectorize check_cflags -Werror=implicit-function-declaration check_cflags -Werror=missing-prototypes check_cflags -Werror=declaration-after-statement |