# fpurge.m4
-# serial 14
+# serial 16
dnl Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_FUNC_FPURGE],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
- AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_HEADERS_ONCE([stdio_ext.h])
AC_CHECK_FUNCS_ONCE([fpurge])
gl_CHECK_FUNCS_ANDROID([__fpurge], [[#include <stdio_ext.h>]])
AC_CHECK_DECLS([fpurge], , , [[#include <stdio.h>]])
- if test "x$ac_cv_func_fpurge" = xyes; then
+ if test $ac_cv_func_fpurge = yes; then
HAVE_FPURGE=1
# Detect BSD bug. Only cygwin 1.7 and musl are known to be immune.
AC_CACHE_CHECK([whether fpurge works], [gl_cv_func_fpurge_works],
- [AC_RUN_IFELSE(
- [AC_LANG_PROGRAM(
- [[#include <stdio.h>
-]],
- [[FILE *f = fopen ("conftest.txt", "w+");
- if (!f)
- return 1;
- if (fputc ('a', f) != 'a')
- { fclose (f); return 2; }
- rewind (f);
- if (fgetc (f) != 'a')
- { fclose (f); return 3; }
- if (fgetc (f) != EOF)
- { fclose (f); return 4; }
- if (fpurge (f) != 0)
- { fclose (f); return 5; }
- if (putc ('b', f) != 'b')
- { fclose (f); return 6; }
- if (fclose (f) != 0)
- return 7;
- if ((f = fopen ("conftest.txt", "r")) == NULL)
- return 8;
- if (fgetc (f) != 'a')
- { fclose (f); return 9; }
- if (fgetc (f) != 'b')
- { fclose (f); return 10; }
- if (fgetc (f) != EOF)
- { fclose (f); return 11; }
- if (fclose (f) != 0)
- return 12;
- if (remove ("conftest.txt") != 0)
- return 13;
- return 0;
- ]])],
- [gl_cv_func_fpurge_works=yes],
- [gl_cv_func_fpurge_works=no],
- [case "$host_os" in
- # Guess yes on musl systems.
- *-musl* | midipix*) gl_cv_func_fpurge_works="guessing yes" ;;
- # Otherwise obey --enable-cross-guesses.
- *) gl_cv_func_fpurge_works="$gl_cross_guess_normal" ;;
- esac
- ])
+ [if test $ac_cv_have_decl_fpurge = yes; then
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <stdio.h>
+ ]],
+ [[FILE *f = fopen ("conftest.txt", "w+");
+ if (!f)
+ return 1;
+ if (fputc ('a', f) != 'a')
+ { fclose (f); return 2; }
+ rewind (f);
+ if (fgetc (f) != 'a')
+ { fclose (f); return 3; }
+ if (fgetc (f) != EOF)
+ { fclose (f); return 4; }
+ if (fpurge (f) != 0)
+ { fclose (f); return 5; }
+ if (putc ('b', f) != 'b')
+ { fclose (f); return 6; }
+ if (fclose (f) != 0)
+ return 7;
+ if ((f = fopen ("conftest.txt", "r")) == NULL)
+ return 8;
+ if (fgetc (f) != 'a')
+ { fclose (f); return 9; }
+ if (fgetc (f) != 'b')
+ { fclose (f); return 10; }
+ if (fgetc (f) != EOF)
+ { fclose (f); return 11; }
+ if (fclose (f) != 0)
+ return 12;
+ if (remove ("conftest.txt") != 0)
+ return 13;
+ return 0;
+ ]])],
+ [gl_cv_func_fpurge_works=yes],
+ [gl_cv_func_fpurge_works=no],
+ [# Obey --enable-cross-guesses.
+ gl_cv_func_fpurge_works="$gl_cross_guess_normal"
+ ])
+ else
+ gl_cv_func_fpurge_works=no
+ fi
])
case "$gl_cv_func_fpurge_works" in
*yes) ;;