configure: add LTO optarg
This allows users to specify an argument such as './configure --enable-lto=thin' to use ThinLTO with Clang. The old functionality with './configure --enable-lto' is preserved. Signed-off-by: J. Dekker <jdek@itanimul.li>
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configure
vendored
20
configure
vendored
@ -412,7 +412,7 @@ Toolchain options:
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--build-suffix=SUFFIX library name suffix []
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--enable-pic build position-independent code
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--enable-thumb compile for Thumb instruction set
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--enable-lto use link-time optimization
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--enable-lto[=arg] use link-time optimization
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--env="ENV=override" override the environment variables
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Advanced options (experts only):
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@ -2524,7 +2524,6 @@ CMDLINE_SELECT="
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debug
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extra_warnings
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logging
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lto
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optimizations
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rpath
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stripping
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@ -4170,6 +4169,9 @@ for opt do
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--enable-sdl)
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enable sdl2
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;;
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--enable-lto*)
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lto=-f${opt#--enable-}
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;;
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--enable-*=*|--disable-*=*)
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eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
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is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
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@ -4639,7 +4641,7 @@ icl_flags(){
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# on Windows, does enable remarks so disable them here.
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-Wall) echo $flag -Qdiag-disable:remark ;;
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-std=c99) echo -Qstd=c99 ;;
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-flto) echo -ipo ;;
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-flto*) echo -ipo ;;
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esac
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done
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}
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@ -4647,7 +4649,7 @@ icl_flags(){
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icc_flags(){
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for flag; do
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case $flag in
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-flto) echo -ipo ;;
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-flto*) echo -ipo ;;
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*) echo $flag ;;
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esac
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done
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@ -7182,17 +7184,17 @@ fi
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check_optflags(){
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check_cflags "$@"
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enabled lto && check_ldflags "$@"
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[ -n "$lto" ] && check_ldflags "$@"
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}
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check_optflags $optflags
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check_optflags -fno-math-errno
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check_optflags -fno-signed-zeros
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if enabled lto; then
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if [ -n "$lto" ]; then
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test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
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check_cflags -flto
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check_ldflags -flto $cpuflags
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check_cflags $lto
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check_ldflags $lto $cpuflags
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disable inline_asm_direct_symbol_refs
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fi
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@ -7223,7 +7225,7 @@ if enabled icc; then
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# icc 11.0 and 11.1 work with ebp_available, but don't pass the test
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enable ebp_available
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# The test above does not test linking
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enabled lto && disable symver_asm_label
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[ -n "$lto" ] && disable symver_asm_label
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if enabled x86_32; then
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icc_version=$($cc -dumpversion)
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test ${icc_version%%.*} -ge 11 &&
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