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-rw-r--r--m4/getdelim.m499
1 files changed, 99 insertions, 0 deletions
diff --git a/m4/getdelim.m4 b/m4/getdelim.m4
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+++ b/m4/getdelim.m4
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+# getdelim.m4 serial 15
+
+dnl Copyright (C) 2005-2007, 2009-2022 Free Software Foundation, Inc.
+dnl
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.59])
+
+AC_DEFUN([gl_FUNC_GETDELIM],
+[
+ AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+ dnl Persuade glibc <stdio.h> to declare getdelim().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_DECLS_ONCE([getdelim])
+
+ AC_CHECK_FUNCS_ONCE([getdelim])
+ if test $ac_cv_func_getdelim = yes; then
+ HAVE_GETDELIM=1
+ dnl Found it in some library. Verify that it works.
+ AC_CACHE_CHECK([for working getdelim function],
+ [gl_cv_func_working_getdelim],
+ [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+ int main ()
+ {
+ FILE *in = fopen ("./conftest.data", "r");
+ if (!in)
+ return 1;
+ {
+ /* Test result for a NULL buffer and a zero size.
+ Based on a test program from Karl Heuer. */
+ char *line = NULL;
+ size_t siz = 0;
+ int len = getdelim (&line, &siz, '\n', in);
+ if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
+ { free (line); fclose (in); return 2; }
+ free (line);
+ }
+ {
+ /* Test result for a NULL buffer and a non-zero size.
+ This crashes on FreeBSD 8.0. */
+ char *line = NULL;
+ size_t siz = (size_t)(~0) / 4;
+ if (getdelim (&line, &siz, '\n', in) == -1)
+ { fclose (in); return 3; }
+ free (line);
+ }
+ fclose (in);
+ return 0;
+ }
+ ]])],
+ [gl_cv_func_working_getdelim=yes],
+ [gl_cv_func_working_getdelim=no],
+ [dnl We're cross compiling.
+ dnl Guess it works on glibc2 systems and musl systems.
+ AC_EGREP_CPP([Lucky GNU user],
+ [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2) && !defined __UCLIBC__
+ Lucky GNU user
+ #endif
+#endif
+ ],
+ [gl_cv_func_working_getdelim="guessing yes"],
+ [case "$host_os" in
+ *-musl*) gl_cv_func_working_getdelim="guessing yes" ;;
+ *) gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;;
+ esac
+ ])
+ ])
+ ])
+ case "$gl_cv_func_working_getdelim" in
+ *yes) ;;
+ *) REPLACE_GETDELIM=1 ;;
+ esac
+ else
+ HAVE_GETDELIM=0
+ fi
+
+ if test $ac_cv_have_decl_getdelim = no; then
+ HAVE_DECL_GETDELIM=0
+ fi
+])
+
+# Prerequisites of lib/getdelim.c.
+AC_DEFUN([gl_PREREQ_GETDELIM],
+[
+ AC_CHECK_FUNCS([flockfile funlockfile])
+ AC_CHECK_DECLS([getc_unlocked])
+])