mcontext is not a standard layout so glibc and musl differ sadly.
Fixes
../../m4-1.4.19/lib/sigsegv.c: In function 'sigsegv_handler':
../../m4-1.4.19/lib/sigsegv.c:223:75: error:
'mcontext_t' has no member named 'uc_regs'; did you mean 'gregs'?
223 | #
define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_mcontext.uc_regs->gregs[1]
|
^~~~~~~
---
lib/sigsegv.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/sigsegv.c b/lib/sigsegv.c
index 696a152..fa0c465 100644
--- a/lib/sigsegv.c
+++ b/lib/sigsegv.c
@@ -217,10 +217,10 @@ int libsigsegv_version = LIBSIGSEGV_VERSION;
# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_mcontext.gp_regs[1]
# else /* 32-bit */
/* both should be equivalent */
-# if 0
-# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_mcontext.regs->gpr[1]
+# if ! defined __GLIBC__
+# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_regs->gregs[1]
# else
-# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_mcontext.uc_regs->gregs[1]
+# define SIGSEGV_FAULT_STACKPOINTER ((ucontext_t *)
ucp)->uc_mcontext.uc_regs->gregs[1]
# endif
# endif
--
2.35.1
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