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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-09-10 09:22:18 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-10-01 08:44:41 -0300 |
| commit | 3f1932ed2e6b643848ea7a42f9f15ed80552befb (patch) | |
| tree | f63a817c296aeb3b8d168ff68e6d68ec00c18980 /configure.ac | |
| parent | 127cefd84dc551a43d0ac58b4619503d04869042 (diff) | |
| download | glibc-3f1932ed2e6b643848ea7a42f9f15ed80552befb.tar.xz glibc-3f1932ed2e6b643848ea7a42f9f15ed80552befb.zip | |
Disable _FILE_OFFSET_BITS if the compiler defaults to it
Even though building glibc with LFS flags is not supported, and the
the usual way is to patch the build system to avoid it [1]; some system
do enable it by default, and it increases the requirements to build
glibc in such cases (it also does not help newcomers when trying
to build glibc).
The conform namespace and linknamespace tests also do not expect
that flag to be set by default, so disable it as well.
Checked with a build/check for major ABI and some (i386, arm,
mipsel, hppa) with a toolchain that has LFS flags by default.
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=31624
Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 5af742ce41..160c863416 100644 --- a/configure.ac +++ b/configure.ac @@ -1564,6 +1564,19 @@ AC_SUBST(no_fortify_source) AC_SUBST(fortify_source) LIBC_CONFIG_VAR([supported-fortify], [$libc_cv_supported_fortify_source]) +dnl Check if compiler define _FILE_OFFSET_BITS by default +AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[ +#ifndef _FILE_OFFSET_BITS +# error _FILE_OFFSET_BITS not defined +#endif]])], + [libc_cv_compiler_default_file_offset_bits=yes], + [libc_cv_compiler_default_file_offset_bits=no]) +AS_IF([test "$libc_cv_compiler_default_file_offset_bits" = yes], + [no_file_offset_bits_source="-U_FILE_OFFSET_BITS"]) +AC_SUBST(no_file_offset_bits_source) +LIBC_CONFIG_VAR([no-file-offset-bits-source], [$no_file_offset_bits_source]) + + dnl Starting with binutils 2.35, GAS can attach multiple symbol versions dnl to one symbol (PR 23840). AC_CACHE_CHECK(whether the assembler requires one version per symbol, |