X-Git-Url: https://ruderich.org/simon/gitweb/?p=coloredstderr%2Fcoloredstderr.git;a=blobdiff_plain;f=configure.ac;h=4b513c3366de705a4486ad6ef77f989e0c09fbb0;hp=a939d8affe5c558827d2117faf541cc3dbf64c77;hb=08e732449774e01a681684b0c48e5e1ef4969709;hpb=9507e0f60ddf054034e1673bd21709aedadee48e

diff --git a/configure.ac b/configure.ac
index a939d8a..4b513c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,7 @@ if test "x$GCC" = xyes; then
     CFLAGS="-Wall -Wextra -Wconversion $CFLAGS"
 fi
 
-AC_CHECK_HEADERS([error.h])
+AC_CHECK_HEADERS([err.h error.h])
 AC_CHECK_HEADERS([fcntl.h],
                  [],[AC_MSG_ERROR([header is required])])
 
@@ -56,6 +56,10 @@ AC_FUNC_FORK
 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])
@@ -80,7 +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])