commit ef089f50f9d6685c7a0ab94f9133576d7beec32b
author Yegappan Lakshmanan <yegappan@yahoo.com> Fri Dec 31 17:33:47 2021 +0000
committer Bram Moolenaar <Bram@vim.org> Fri Dec 31 17:33:47 2021 +0000
tree 347e4a24974dccf79344b31649c42f6c67ca4b92
parent 1a9922243a90f213894d5c58cd063465eea3350f

patch 8.2.3958: build failure compiling xxd with "-std=c2x"

Problem:    Build failure compiling xxd with "-std=c2x".
Solution:   define _XOPEN_SOURCE. (Yegappan Lakshmanan, closes #9444)

src/xxd/xxd.c

diff --git a/src/xxd/xxd.c b/src/xxd/xxd.c
index cf2a356..c32b9b8 100644
--- a/src/xxd/xxd.c
+++ b/src/xxd/xxd.c
@@ -72,6 +72,10 @@
 # define CYGWIN
 #endif
 
+#if (defined(__linux__) && !defined(__ANDROID__)) || defined(__CYGWIN__)
+# define _XOPEN_SOURCE 700   /* for fdopen() */
+#endif
+
 #include <stdio.h>
 #ifdef VAXC
 # include <file.h>