diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 46a74687a6..064743c131 100644 --- a/configure.ac +++ b/configure.ac @@ -137,6 +137,13 @@ AC_ARG_WITH([selinux], [if building with SELinux support]), [with_selinux=$withval], [with_selinux=auto]) +dnl This is a temporary hack, to help sort out wired-in GCC assumptions. +AC_ARG_WITH([clang], + AC_HELP_STRING([--with-clang], + [if building with clang (temporary)]), + [with_clang=$withval], + [with_clang=no]) +LIBC_CONFIG_VAR([with-clang], [$with_clang]) AC_ARG_WITH([headers], AC_HELP_STRING([--with-headers=PATH], @@ -454,6 +461,16 @@ if test "$have_tunables" = yes; then AC_DEFINE(HAVE_TUNABLES) fi +AC_ARG_ENABLE([float128], + AC_HELP_STRING([--disable-float128], + [disable float128 support]), + [enable_float128=$enableval], + [enable_float128=yes]) +AC_SUBST(enable_float128) +if test "$enable_float128" = yes; then + AC_DEFINE(WANT_FLOAT128) +fi + # The abi-tags file uses a fairly simplistic model for name recognition that # can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a # $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell. @@ -1018,7 +1035,9 @@ AC_CHECK_PROG_VER(BISON, bison, --version, AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [ AC_TRY_COMPILE([], [ #if !defined __GNUC__ || __GNUC__ < 5 +#if !defined __clang__ #error insufficient compiler +#endif #endif], [libc_cv_compiler_ok=yes], [libc_cv_compiler_ok=no])]) @@ -1556,7 +1575,7 @@ char *foo (const char *a, const char *b) } EOF dnl -if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "my_strstr" > /dev/null]); +if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "strstr" > /dev/null]); then libc_cv_gcc_builtin_redirection=yes else @@ -1599,7 +1618,7 @@ __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) foo (void) {} EOF libc_cv_cc_loop_to_function=no -if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) +if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Werror -c conftest.c]) then libc_cv_cc_loop_to_function=yes fi @@ -1865,7 +1884,10 @@ AC_SUBST(libc_cv_pie_default) # Set the `multidir' variable by grabbing the variable from the compiler. # We do it once and save the result in a generated makefile. +libc_cv_multidir=. +if test "$with_clang" = no; then libc_cv_multidir=`${CC-cc} $CFLAGS $CPPFLAGS -print-multi-directory` +fi AC_SUBST(libc_cv_multidir) if test "$static_pie" = yes; then |