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| author | Jonathan Wakely <jwakely@redhat.com> | 2019-01-07 12:38:51 +0000 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2019-01-07 12:38:51 +0000 |
| commit | cf4b581f2e28368c01fe93792ebc6eefb2bc8116 (patch) | |
| tree | e97aa3a3f62308d35f617bfdfd0d7cc819e035dd /libstdc++-v3/config.h.in | |
| parent | f4bf2aabe36633d75852313caafe7efab71d5ba7 (diff) | |
| download | gcc-cf4b581f2e28368c01fe93792ebc6eefb2bc8116.zip gcc-cf4b581f2e28368c01fe93792ebc6eefb2bc8116.tar.gz gcc-cf4b581f2e28368c01fe93792ebc6eefb2bc8116.tar.bz2 | |
Fix build for systems without POSIX truncate
Older versions of newlib do not provide truncate so add a configure
check for it, and provide a fallback definition.
There were also some missing exports in the linker script, which went
unnoticed because there are no tests for some functions. A new link-only
test checks that every filesystem operation function is defined by the
library.
* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
* config.h.in: Regenerate.
* config/abi/pre/gnu.ver: Order patterns for filesystem operations
alphabetically and add missing entries for copy_symlink,
hard_link_count, rename, and resize_file.
* configure: Regenerate.
* src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
used unconditionally.
* src/filesystem/ops-common.h (__gnu_posix::truncate)
[!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
supports truncating to zero length.
* testsuite/27_io/filesystem/operations/all.cc: New test.
* testsuite/27_io/filesystem/operations/resize_file.cc: New test.
From-SVN: r267647
Diffstat (limited to 'libstdc++-v3/config.h.in')
| -rw-r--r-- | libstdc++-v3/config.h.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in index 97b5eed..225ef1b 100644 --- a/libstdc++-v3/config.h.in +++ b/libstdc++-v3/config.h.in @@ -511,6 +511,9 @@ /* Define to 1 if the target supports thread-local storage. */ #undef HAVE_TLS +/* Define if truncate is available in <unistd.h>. */ +#undef HAVE_TRUNCATE + /* Define to 1 if you have the <uchar.h> header file. */ #undef HAVE_UCHAR_H |