diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 9cbc0bf68f..d5a00461ff 100644 --- a/configure.ac +++ b/configure.ac @@ -1468,6 +1468,15 @@ if test $libc_cv_cc_loop_to_function = yes; then fi AC_SUBST(libc_cv_cc_loop_to_function) +AC_CACHE_CHECK([for -Wimplicit-fallthrough], + libc_cv_cc_wimplicit_fallthrough, [dnl +LIBC_TRY_CC_OPTION([-Werror -Wimplicit-fallthrough], + [libc_cv_cc_wimplicit_fallthrough=-Wimplicit-fallthrough], + [libc_cv_cc_wimplicit_fallthrough=]) +]) +LIBC_CONFIG_VAR([cc-option-wimplicit-fallthrough], + [$libc_cv_cc_wimplicit_fallthrough]) + dnl Check whether we have the gd library available. AC_MSG_CHECKING(for libgd) if test "$with_gd" != "no"; then @@ -1527,7 +1536,7 @@ dnl If not, then don't use it. dnl Note that _FORTIFY_SOURCE may have been set through FLAGS too. dnl _FORTIFY_SOURCE value will be selectively disabled for function that can't dnl support it -no_fortify_source="-Wp,-U_FORTIFY_SOURCE" +no_fortify_source="-U_FORTIFY_SOURCE" fortify_source="${no_fortify_source}" AC_CACHE_CHECK([for maximum supported _FORTIFY_SOURCE level], @@ -1546,7 +1555,7 @@ AS_CASE([$enable_fortify_source], [libc_cv_fortify_source=no]) AS_IF([test "$libc_cv_fortify_source" = yes], - [fortify_source="${fortify_source},-D_FORTIFY_SOURCE=${enable_fortify_source}"] + [fortify_source="${fortify_source} -D_FORTIFY_SOURCE=${enable_fortify_source}"] ) AC_SUBST(enable_fortify_source) @@ -1555,6 +1564,30 @@ 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], [$no_file_offset_bits_source]) + +dnl Check if compiler define _TIME_BITS by default +AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[ +#ifndef _TIME_BITS +# error _TIME_BITS not defined +#endif]])], + [libc_cv_compiler_default_time_bits=yes], + [libc_cv_compiler_default_time_bits=no]) +AS_IF([test "$libc_cv_compiler_default_time_bits" = yes], + [no_time_bits_source="-U_TIME_BITS"]) +AC_SUBST(no_time_bits_source) +LIBC_CONFIG_VAR([no-time-bits-source], [$no_time_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, |