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https://bugs.gentoo.org/879657
https://github.com/SWI-Prolog/swipl-devel/commit/2328d9d54c8aa368a4bf0165b1b811d1f31ba0f7
https://github.com/SWI-Prolog/swipl-devel/commit/0d1088443348b71a3624835a19469e2b6cc7e284
From 2328d9d54c8aa368a4bf0165b1b811d1f31ba0f7 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 10 Jan 2023 14:08:04 +0100
Subject: [PATCH] cmake: Fix C99 compatibility issues in GCC built-in detection
Future compilers may not support implicit ints or implicit
function declarations, so avoid them, by using an explicit int
type and including <alloca.h> for the alloca function.
--- a/cmake/GCCBuiltins.cmake
+++ b/cmake/GCCBuiltins.cmake
@@ -22,7 +22,7 @@ check_c_source_compiles(
"volatile int i=0; int main() { return 0; }"
HAVE_VOLATILE)
check_c_source_compiles(
- "static inline foo() { return 0; } int main() { return foo(); }"
+ "static inline int foo() { return 0; } int main() { return foo(); }"
HAVE_INLINE)
check_c_source_compiles(
"int main() { void *p = &&lbl; goto *p; lbl: return 0; }"
@@ -45,7 +45,7 @@ check_visibility()
# Builtin functions that lead to conflicts
check_c_source_compiles(
- "int main() { char *s = alloca(10); return s!=0; }"
+ "#include <alloca.h>\nint main() { char *s = alloca(10); return s!=0; }"
HAVE_ALLOCA)
check_c_source_compiles(
"#include <math.h>\nint main() { double x; return signbit(x); }"
From 0d1088443348b71a3624835a19469e2b6cc7e284 Mon Sep 17 00:00:00 2001
From: Jan Wielemaker <J.Wielemaker@vu.nl>
Date: Wed, 11 Jan 2023 13:30:34 +0100
Subject: [PATCH] Cleanup some no longer used GCC __builtin checks.
--- a/cmake/GCCBuiltins.cmake
+++ b/cmake/GCCBuiltins.cmake
@@ -9,12 +9,6 @@ check_c_source_compiles(
check_c_source_compiles(
"int i=0; int main() { return __builtin_expect(i, 0) ? 0 : 1; }"
HAVE___BUILTIN_EXPECT)
-check_c_source_compiles(
- "int i=0; struct {int x[10];} st; int main() { return __builtin_choose_expr(1, i, st); }"
- HAVE___BUILTIN_CHOOSE_EXPR)
-check_c_source_compiles(
- "int i=0; int main() { return __builtin_types_compatible_p(typeof(i), int); }"
- HAVE___BUILTIN_TYPES_COMPATIBLE_P)
check_c_source_compiles(
"__thread int i=0; int main() { return 0; }"
HAVE___THREAD)
@@ -48,5 +42,5 @@ check_c_source_compiles(
"#include <alloca.h>\nint main() { char *s = alloca(10); return s!=0; }"
HAVE_ALLOCA)
check_c_source_compiles(
- "#include <math.h>\nint main() { double x; return signbit(x); }"
+ "#include <math.h>\nint main() { double x = 0.0; return signbit(x); }"
HAVE_SIGNBIT)
|
