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| -rw-r--r-- | m4/jm-glibc-io.m4 | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/m4/jm-glibc-io.m4 b/m4/jm-glibc-io.m4 new file mode 100644 index 000000000..e88f24caf --- /dev/null +++ b/m4/jm-glibc-io.m4 @@ -0,0 +1,35 @@ +dnl This file is automatically generated from m4/jm-glibc-io.m4n. + +#serial 5 -*- autoconf -*- + +dnl From Jim Meyering. +dnl +dnl See if the glibc *_unlocked I/O macros are available. +dnl Use only those *_unlocked macros that are declared. +dnl + +AC_DEFUN(jm_FUNC_GLIBC_UNLOCKED_IO, + [ + # Kludge (not executed) to make autoheader do the right thing. + if test a = b; then + AC_CHECK_DECLS([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]) + AC_CHECK_FUNCS(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) + fi + + io_functions='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' + + for jm_io_func in $io_functions; do + # Check for the existence of each function only if it is declared. + # Otherwise, we'd get the Solaris5.5.1 functions that are not + # declared, and that have been removed from Solaris5.6. The resulting + # 5.5.1 binaries would not run on 5.6 due to shared library differences. + AC_CHECK_DECLS([$jm_io_func], + jm_declared=yes, + jm_declared=no, + [#include <stdio.h>]) + if test $jm_declared = yes; then + AC_CHECK_FUNCS($jm_io_func) + fi + done + ] +) |