diff options
Diffstat (limited to 'm4/unlocked-io.m4')
| -rw-r--r-- | m4/unlocked-io.m4 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/m4/unlocked-io.m4 b/m4/unlocked-io.m4 new file mode 100644 index 00000000..f8e98f1d --- /dev/null +++ b/m4/unlocked-io.m4 @@ -0,0 +1,22 @@ +#serial 8 -*- autoconf -*- + +dnl From Jim Meyering. +dnl +dnl See if the glibc *_unlocked I/O macros or functions are available. +dnl Use only those *_unlocked macros or functions that are declared +dnl (because some of them were declared in Solaris 2.5.1 but were removed +dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run +dnl on Solaris 2.6). + +AC_DEFUN([jm_FUNC_GLIBC_UNLOCKED_IO], +[ + dnl Persuade glibc and Solaris <stdio.h> to declare + dnl fgets_unlocked(), fputs_unlocked() etc. + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + + AC_CHECK_DECLS_ONCE( + [clearerr_unlocked feof_unlocked ferror_unlocked + fflush_unlocked fgets_unlocked fputc_unlocked fputs_unlocked + fread_unlocked fwrite_unlocked getc_unlocked + getchar_unlocked putc_unlocked putchar_unlocked]) +]) |