cmake: use writev(3p) wrapper as needed

This is a companion patch of 3b9b2c2a29a (compat/posix: introduce writev(3p) wrapper, 2026-03-13) where support for using the `writev()` wrapper was introduced in the `Makefile` and the Meson-based build, but the CMake build still needs that treatment, too. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Johannes Schindelin committed Apr 3, 2026 at 08:55 UTC 89152af176ea94ea8f3249115b6e00827fbbeb70
1 file changed +5 -1
contrib/buildsystems/CMakeLists.txt
+5 -1
@@ -374,7 +374,7 @@ endif()
374 #function checks
375 set(function_checks
376 strcasestr memmem strlcpy strtoimax strtoumax strtoull
377 - setenv mkdtemp poll pread memmem)
377 + setenv mkdtemp poll pread memmem writev)
378
379 #unsetenv,hstrerror are incompatible with windows build
380 if(NOT WIN32)
@@ -419,6 +419,10 @@ if(NOT HAVE_MEMMEM)
419 list(APPEND compat_SOURCES compat/memmem.c)
420 endif()
421
422 +if(NOT HAVE_WRITEV)
423 + list(APPEND compat_SOURCES compat/writev.c)
424 +endif()
425 +
426 if(NOT WIN32)
427 if(NOT HAVE_UNSETENV)
428 list(APPEND compat_SOURCES compat/unsetenv.c)