glibc.git/configure, branch glibc-2.41

configure: Clear libc_cv_cc_wimplicit_fallthrough if not supported

2025-01-10T01:07:05+00:00

Clear libc_cv_cc_wimplicit_fallthrough if -Wimplicit-fallthrough isn't
supported.  Tested with GCC 6.4.1 on x86-64.

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

Rename have-mtls-descriptor to have-test-mtls-descriptor

2025-01-03T20:51:21+00:00

Since have-mtls-descriptor is only used for glibc testing, rename it to
have-test-mtls-descriptor.  Also enable tst-gnu2-tls2-amx only if
$(have-test-mtls-descriptor) == gnu2.

Tested with GCC 14 and Clang 19/18/17 on x86-64.

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

stdio-common: Use clang with bugfix for bug28

2024-12-24T11:33:33+00:00

The issue that was the cause of hang was fixed in upstream.

Reviewed-by: H.J. Lu

configure: Improve configure output for C++ Compiler

2024-12-23T06:58:53+00:00

Change configure output for C++ Compiler from

...
checking -finput-charset=ascii in testing... -finput-charset=ascii
checking -finput-charset=ascii in testing... -finput-charset=ascii
...

to

...
checking -finput-charset=ascii in testing... -finput-charset=ascii
checking g++ -finput-charset=ascii in testing... -finput-charset=ascii
...

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

string: Suppress Clang warnings on tester.c

2024-12-22T22:28:55+00:00

Add a configure check for -Wno-fortify-source to suppress Clang warnings
on string/tester.c, like:

tester.c:385:10: error: 'strncat' size argument is too large; destination buffer has size 50, but size argument is 99 [-Werror,-Wfortify-source]
  385 |   check (strncat (one, "lmn", 99) == one, 1);   /* Returned value. */

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

Check if TEST_CC supports -Wno-restrict before using it

2024-12-22T20:32:51+00:00

Check if TEST_CC supports -Wno-restrict before using it to avoid Clang
error:

error: unknown warning option '-Wno-restrict' [-Werror,-Wunknown-warning-option]

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

elf: Enable tst-dlopen-nodelete-reloc if TEST_CXX supports STB_GNU_UNIQUE

2024-12-22T09:20:15+00:00

tst-dlopen-nodelete-reloc requires STB_GNU_UNIQUE support so that NODELETE
is propagated by do_lookup_unique.  Enable it only if TEST_CXX supports
STB_GNU_UNIQUE,

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

elf: Check PDE load address with non-empty text section

2024-12-22T08:16:45+00:00

Check PDE load address with non-empty text section:

.globl _start
_start:
.globl __start
	.byte 0

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

elf: Compile test modules with -fsemantic-interposition

2024-12-22T05:15:43+00:00

Compiler may default to -fno-semantic-interposition. But some elf test
modules must be compiled with -fsemantic-interposition to function properly.
Add a TEST_CC check for -fsemantic-interposition and use it on elf test
modules.  This fixed

FAIL: elf/tst-dlclose-lazy
FAIL: elf/tst-pie1
FAIL: elf/tst-plt-rewrite1
FAIL: elf/unload4

when Clang 19 is used to test glibc.

Signed-off-by: H.J. Lu 
Reviewed-by: Sam James

Add include/libc-misc.h

2024-12-22T05:03:46+00:00

Add include/libc-misc.h to provide miscellaneous definitions for both
glibc build and test:

1. Move inhibit_stack_protector to libc-misc.h and add Clang support.
2. Add test_inhibit_stack_protector for glibc testing.
3. Move inhibit_loop_to_libcall to libc-misc.h.
4. Add test_cc_inhibit_loop_to_libcall to handle TEST_CC != CC and
replace inhibit_loop_to_libcall with test_cc_inhibit_loop_to_libcall
in glibc tests.

Signed-off-by: H.J. Lu 
Co-Authored-By: Adhemerval Zanella 
Reviewed-by: Sam James