Commit aad6ef1fc3

Andrew Kelley <andrew@ziglang.org>
2022-01-29 02:31:23
glibc: version-gate _DYNAMIC_STACK_SIZE_SOURCE
This is a patch to glibc features.h which makes _DYNAMIC_STACK_SIZE_SOURCE undefined unless the version is >= 2.34. This feature was introduced with glibc 2.34 and without this patch, code built against these headers but then run on an older glibc will end up making a call to sysconf() that returns -1 for the value of SIGSTKSZ and MINSIGSTKSZ. Closes #10713
1 parent b54f618
Changed files (1)
lib
libc
include
generic-glibc
features.h
lib/libc/include/generic-glibc/features.h
@@ -220,8 +220,12 @@
 # define _DEFAULT_SOURCE	1
 # undef  _ATFILE_SOURCE
 # define _ATFILE_SOURCE	1
+
+# if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || __GLIBC__ > 2
 # undef  _DYNAMIC_STACK_SIZE_SOURCE
 # define _DYNAMIC_STACK_SIZE_SOURCE 1
+# endif
+
 #endif
 
 /* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
@@ -512,4 +516,4 @@
 #include <gnu/stubs.h>
 
 
-#endif	/* features.h  */
\ No newline at end of file
+#endif	/* features.h  */