Commit 65d12900 authored by Mans Rullgard's avatar Mans Rullgard
Browse files

configure: add --enable-lto option



This works with gcc.  Other compilers might need to have a flag
mapping added.
Signed-off-by: default avatarMans Rullgard <mans@mansr.com>
parent 54b24314
......@@ -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
......
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