guix/gnu/packages/patches/valgrind-glibc-compat.patch

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Fix build failure with glibc 2.26.
Patch copied from upstream source repository:
https://sourceware.org/git/?p=valgrind.git;a=commit;h=2b5eab6a8db1b0487a3ad7fc4e7eeda6d3513626
diff --git a/memcheck/tests/linux/stack_changes.c b/memcheck/tests/linux/stack_changes.c
index a978fc2..7f97b90 100644
--- a/memcheck/tests/linux/stack_changes.c
+++ b/memcheck/tests/linux/stack_changes.c
@@ -10,7 +10,7 @@
// This test is checking the libc context calls (setcontext, etc.) and
// checks that Valgrind notices their stack changes properly.
-typedef struct ucontext mycontext;
+typedef ucontext_t mycontext;
mycontext ctx1, ctx2, oldc;
int count;