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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 17:47:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 17:47:50 +0000 |
commit | bbe35a6e1b54ef5cd7c1c471886c30ba85c0804e (patch) | |
tree | 985a31e8c860c690d9f20e6621ce5fcc05ccd244 /m4/fpurge.m4 | |
parent | Initial commit. (diff) | |
download | wget-bbe35a6e1b54ef5cd7c1c471886c30ba85c0804e.tar.xz wget-bbe35a6e1b54ef5cd7c1c471886c30ba85c0804e.zip |
Adding upstream version 1.21.upstream/1.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/fpurge.m4')
-rw-r--r-- | m4/fpurge.m4 | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/m4/fpurge.m4 b/m4/fpurge.m4 new file mode 100644 index 0000000..9a486e0 --- /dev/null +++ b/m4/fpurge.m4 @@ -0,0 +1,73 @@ +# fpurge.m4 serial 12 +dnl Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc. +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_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]) + AC_CHECK_FUNCS_ONCE([__fpurge]) + AC_CHECK_DECLS([fpurge], , , [[#include <stdio.h>]]) + if test "x$ac_cv_func_fpurge" = xyes; then + HAVE_FPURGE=1 + # Detect BSD bug. Only cygwin 1.7 and musl are known to be immune. + AC_CACHE_CHECK([whether fpurge works], [gl_cv_func_fpurge_works], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <stdio.h> +]], + [[FILE *f = fopen ("conftest.txt", "w+"); + if (!f) + return 1; + if (fputc ('a', f) != 'a') + { fclose (f); return 2; } + rewind (f); + if (fgetc (f) != 'a') + { fclose (f); return 3; } + if (fgetc (f) != EOF) + { fclose (f); return 4; } + if (fpurge (f) != 0) + { fclose (f); return 5; } + if (putc ('b', f) != 'b') + { fclose (f); return 6; } + if (fclose (f) != 0) + return 7; + if ((f = fopen ("conftest.txt", "r")) == NULL) + return 8; + if (fgetc (f) != 'a') + { fclose (f); return 9; } + if (fgetc (f) != 'b') + { fclose (f); return 10; } + if (fgetc (f) != EOF) + { fclose (f); return 11; } + if (fclose (f) != 0) + return 12; + if (remove ("conftest.txt") != 0) + return 13; + return 0; + ]])], + [gl_cv_func_fpurge_works=yes], + [gl_cv_func_fpurge_works=no], + [case "$host_os" in + # Guess yes on musl systems. + *-musl*) gl_cv_func_fpurge_works="guessing yes" ;; + # Otherwise obey --enable-cross-guesses. + *) gl_cv_func_fpurge_works="$gl_cross_guess_normal" ;; + esac + ]) + ]) + case "$gl_cv_func_fpurge_works" in + *yes) ;; + *) REPLACE_FPURGE=1 ;; + esac + else + HAVE_FPURGE=0 + fi + if test "x$ac_cv_have_decl_fpurge" = xno; then + HAVE_DECL_FPURGE=0 + fi +]) |