X-Git-Url: https://ruderich.org/simon/gitweb/?p=coloredstderr%2Fcoloredstderr.git;a=blobdiff_plain;f=configure.ac;h=4b513c3366de705a4486ad6ef77f989e0c09fbb0;hp=cb3af17f496992dd59789ef0a2e2748ae06ff243;hb=08e732449774e01a681684b0c48e5e1ef4969709;hpb=d4f585e07894e949c3479b0ab679003064a28689

diff --git a/configure.ac b/configure.ac
index cb3af17..4b513c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,9 @@ if test "x$GCC" = xyes; then
     CFLAGS="-Wall -Wextra -Wconversion $CFLAGS"
 fi
 
-AC_CHECK_HEADERS([fcntl.h error.h])
+AC_CHECK_HEADERS([err.h error.h])
+AC_CHECK_HEADERS([fcntl.h],
+                 [],[AC_MSG_ERROR([header is required])])
 
 AC_TYPE_PID_T
 AC_TYPE_SIZE_T
@@ -45,8 +47,19 @@ AC_TYPE_SSIZE_T
 AC_C_INLINE
 AX_C___ATTRIBUTE__
 
+AC_CHECK_MEMBER([struct _IO_FILE._fileno],
+                [AC_DEFINE([HAVE_STRUCT__IO_FILE__FILENO], 1,
+                           [Define to 1 if `_fileno' is a member of `struct _IO_FILE'.])],
+                [],[[#include <libio.h>]]) dnl ' fix for vim syntax coloring
+
 AC_FUNC_FORK
-AC_CHECK_FUNCS([dup2 memmove setenv strdup])
+AC_CHECK_FUNCS([memmove setenv],
+               [],[AC_MSG_ERROR([function is required])])
+AC_CHECK_FUNCS([execvpe])
+dnl These are not in POSIX.
+AC_CHECK_FUNCS([fwrite_unlocked fputs_unlocked fputc_unlocked])
+dnl Internal functions in libc implementations which must be hooked.
+AC_CHECK_FUNCS([__overflow __swbuf])
 
 dnl Thanks to gperftools' configure.ac (https://code.google.com/p/gperftools).
 AC_MSG_CHECKING([for __builtin_expect])
@@ -71,7 +84,8 @@ AC_ARG_ENABLE([debug],
                    AC_DEFINE([WARNING], 1)
                fi])
 
-dnl Used in tests/Makefile.am to build the test only if error() is available.
+dnl Used in tests/Makefile.am to build the test only if function is available.
+AM_CONDITIONAL([HAVE_ERR_H],[test "x$ac_cv_header_err_h" = xyes])
 AM_CONDITIONAL([HAVE_ERROR_H],[test "x$ac_cv_header_error_h" = xyes])
 AM_CONDITIONAL([HAVE_VFORK],[test "x$ac_cv_func_vfork_works" = xyes])