diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/configure.ac b/configure.ac index 34f29558c..a7a8bfc13 100644 --- a/configure.ac +++ b/configure.ac @@ -430,14 +430,26 @@ if test $gl_cv_list_mounted_fs = yes && test $gl_cv_fs_space = yes; then gl_ADD_PROG([optional_bin_progs], [df]) fi -# Limit stdbuf to ELF systems with GCC -AC_MSG_CHECKING([whether this is an ELF system]) -AC_EGREP_CPP([yes], [#if __ELF__ -yes -#endif], [elf_sys=yes], [elf_sys=no]) -AC_MSG_RESULT([$elf_sys]) -if test "$elf_sys" = "yes" && \ - test "$GCC" = "yes"; then +AC_MSG_CHECKING([whether this is system supports stdbuf]) +AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[ + static int stdbuf = 0; + + /* Restrict to ELF systems with compilers + that support the constructor attribute. */ + void __attribute__ ((constructor)) + stdbuf_init (void) + { + #if __ELF__ + stdbuf = 1; + #endif + }]],[[ + return !(stdbuf == 1);]]) + ], + [stdbuf_supported=yes], + [stdbuf_supported=no]) +AC_MSG_RESULT([$stdbuf_supported]) +if test "$stdbuf_supported" = "yes"; then gl_ADD_PROG([optional_bin_progs], [stdbuf]) fi |