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author | Jörg Frings-Fürst <debian@jff.email> | 2022-01-08 11:53:52 +0100 |
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committer | Jörg Frings-Fürst <debian@jff.email> | 2022-01-08 11:53:52 +0100 |
commit | fa838e76139763f902c7d27cb9e1d393ed6a15e4 (patch) | |
tree | 7d0ae09775ea950056193eaa2ca93844299d46f1 /gnulib-m4/ftruncate.m4 | |
parent | c78359d9542c86b972aac373efcf7bc7a8a560e5 (diff) | |
parent | 2959e59fab3bab834368adefd90bd4b1b094366b (diff) |
Merge branch 'feature/upstream' into develop
Diffstat (limited to 'gnulib-m4/ftruncate.m4')
-rw-r--r-- | gnulib-m4/ftruncate.m4 | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gnulib-m4/ftruncate.m4 b/gnulib-m4/ftruncate.m4 new file mode 100644 index 0000000..2697e0e --- /dev/null +++ b/gnulib-m4/ftruncate.m4 @@ -0,0 +1,40 @@ +# serial 21 + +# See if we need to emulate a missing ftruncate function using _chsize. + +# Copyright (C) 2000-2001, 2003-2007, 2009-2022 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_FTRUNCATE], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([ftruncate]) + if test $ac_cv_func_ftruncate = yes; then + m4_ifdef([gl_LARGEFILE], [ + AC_REQUIRE([AC_CANONICAL_HOST]) + case "$host_os" in + mingw*) + dnl Native Windows, and Large File Support is requested. + dnl The MSVCRT _chsize() function only accepts a 32-bit file size, + dnl and the mingw64 ftruncate64() function is unreliable (it may + dnl delete the file, see + dnl <https://web.archive.org/web/20160425005423/http://mingw-w64.sourcearchive.com/documentation/2.0-1/ftruncate64_8c_source.html>). + dnl Use gnulib's ftruncate() implementation instead. + REPLACE_FTRUNCATE=1 + ;; + esac + ], [ + : + ]) + else + HAVE_FTRUNCATE=0 + fi +]) + +# Prerequisites of lib/ftruncate.c. +AC_DEFUN([gl_PREREQ_FTRUNCATE], +[ + AC_CHECK_FUNCS([_chsize]) +]) |