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| author | Sergei Trofimovich <slyich@gmail.com> | 2022-02-20 09:39:59 +0000 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2022-03-07 10:54:16 +0100 |
| commit | f047133e7b43433e77dc01741d559ac9e2a9ea58 (patch) | |
| tree | 8d612bc43c2b180fd53f5b07c7e108b29092d668 /configure.ac | |
| parent | 347321ece9fc85ddf74af3c798230b7b187fbce9 (diff) | |
| download | guile-f047133e7b43433e77dc01741d559ac9e2a9ea58.tar.gz | |
build: Test '-flto' on both compiler and linker.
Before the change ./configure incorrectly enabled -flto on toolchains
that support -flto on compiler side but don't support -flto on linker
side. This caused incorrect type size detection on nixpkgs' Darwin:
configure:54594: checking size of size_t
configure:54600: clang -std=gnu11 -o conftest -g -O2 -flto conftest.c >&5
ld: warning: ignoring file /private/tmp/nix-build-guile-3.0.8.drv-0/conftest-00e93d.o,
building for macOS-x86_64 but attempting to link with file built
for unknown-unsupported file format ( 0xDE 0xC0 0x17 0x0B 0x00 0x00 0x00 0x00 0x14 0x00 0x00 0x00 0x80 0x1A 0x00 0x00 )
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
Taken from https://github.com/NixOS/nixpkgs/pull/160051#issuecomment-1046105041
The change makes sure -flto support tests basic support of just for
object file generation but for linker as well.
* configure.ac: use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index ad7ff12c6..30229489d 100644 --- a/configure.ac +++ b/configure.ac @@ -69,7 +69,7 @@ AC_MSG_CHECKING([whether the compiler supports -flto]) old_CFLAGS="$CFLAGS" LTO_CFLAGS="-flto" CFLAGS="$CFLAGS $LTO_CFLAGS" -AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],, [LTO_CFLAGS=]) +AC_LINK_IFELSE([AC_LANG_PROGRAM([int foo;], [])],, [LTO_CFLAGS=]) CFLAGS="$old_CFLAGS" if test -n "$LTO_CFLAGS"; then AC_MSG_RESULT([yes]) |