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Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d230635a71..829f4be0ec 100644 --- a/configure.ac +++ b/configure.ac @@ -1599,6 +1599,40 @@ LIBC_TRY_TEST_CXX_OPTION([-finput-charset=ascii], LIBC_CONFIG_VAR(test-config-cxxflags-finput-charset-ascii, $libc_cv_test_cxxflags_finput_charset_ascii) +conftest_code=" +extern int not_exist (void); + +inline int make_unique (void) +{ + /* Static variables in inline functions and classes + generate STB_GNU_UNIQUE symbols. */ + static int unique; + return ++unique; +} + +int foo (void) +{ + return make_unique () + not_exist (); +} +" + +dnl Check if TEST_CXX supports STB_GNU_UNIQUE. +LIBC_TRY_TEST_CXX_COMMAND([for STB_GNU_UNIQUE], + [$conftest_code], + [-c], + libc_cv_test_stb_gnu_unique, + [ +if LC_ALL=C $READELF -sW conftest \ + | grep -q "UNIQUE.* _ZZ11make_uniquevE6unique"; then + libc_cv_test_stb_gnu_unique=yes +else + libc_cv_test_stb_gnu_unique=no +fi + ], + [libc_cv_test_stb_gnu_unique=no], +) +LIBC_CONFIG_VAR([have-test-stb-gnu-unique], [$libc_cv_test_stb_gnu_unique]) + dnl Check whether we have the gd library available. AC_MSG_CHECKING(for libgd) if test "$with_gd" != "no"; then |