user/sven/glibc.git/support, branch master

configure: Repurpose have-cc-with-libunwind for clang support

2026-03-12T16:52:50Z

The `have-cc-with-libunwind` check (and its corresponding macro HAVE_CC_WITH_LIBUNWIND) was historically specific to IA64, intended to supplement libgcc with libunwind. Since this logic is unused in current GCC configurations, this patch repurposes it to support clang-based toolchains that utilize LLVM's libunwind instead of libgcc_s. The configure script now detects if the compiler natively supports unwinding via `-lunwind`. Additionally, when this mode is enabled, `-lclang_rt.builtins` is explicitly added to the `libgcc_eh` definition. This is necessary because `links-dso-program` otherwise fails to link due to a missing `__gcc_personality_v0` symbol. It appears that clang does not automatically link the builtins providing this personality routine when `rlink-path` is actively used during the build. Reviewed-by: Sam James

configure: Parametrize runtime libraries to support compiler-rt

2026-03-12T16:52:50Z

Historically, the build system has hardcoded references to `-lgcc` and `-lgcc_eh`, explicitly assuming the use of the GCC runtime. This prevents building glibc with alternative toolchains, specifically clang configured with `--rtlib=compiler-rt`, where these libraries are replaced by `libclang_rt.builtins`. This patch introduces a mechanism to dynamically detect the compiler's underlying runtime library. The logic works as follows: 1. It queries the compiler using `-print-libgcc-file-name`. 2. It parses the output path to determine if `libgcc` or `compiler-rt` is in use. 3. Based on this detection, it parametrizes the build variables for the static runtime and exception handling libraries (replacing hardcoded `-lgcc` and `-lgcc_eh`). This ensures that the build system correctly links against the active compiler runtime—whether it is the traditional libgcc or LLVM's compiler-rt—without requiring manual overrides. Reviewed-by: Sam James

support: no_override_resolv_conf_search flag for resolver test framework

2026-03-03T17:48:47Z

It is required to test "search ." in /etc/resolv.conf files. The default is to override the search path isolate from unexpected settings in the test execution environment. Reviewed-by: Carlos O'Donell

support: Add support for starting and stopping nscd

2026-02-12T11:18:54Z

Reviewed-by: DJ Delorie

support: Add missing NSS formatting and checking functions

2026-02-12T11:18:54Z

This change is largely auto-generated. The function implementations are mechanical and use the glibc-specific support framework, so this should be low-risk and therefore acceptable. The struct etherent type is currently internal-only (although it can be used by NSS modules), which is why it is not included here. Reviewed-by: DJ Delorie

support: Clean up NSS formatting and checking functions

2026-02-12T11:18:54Z

Move includes into the implementation files. Use const where appropriate. Introduce support_check_nss and use it to implement the check_* functions. Reviewed-by: DJ Delorie

support: Also put libaudit, libcap into the testroot if present

2026-02-04T08:46:07Z

Some configurations of nscd are linked against those libraries.

support: Add support_spawn_wrap and related functionality

2026-02-02T20:15:48Z

It allows us to write test cases in C that run tests with dynamic linker wrapping. The iconv test case was auto-generated. The posix_spawn usage is mechanical, and the interface it tests is newly added in this commit, so this should be acceptable. Reviewed-by: Adhemerval Zanella

support: Reinitialize containers if /etc is present

2026-01-24T09:29:39Z

This prevents test failures because configuration file leftovers unexpectedly change glibc for future tests. Whether this triggers depends on test execution order. Adding postclean.req files manually (before this change) appears too error-prone. Reviewed-by: DJ Delorie

support: Add support_hardcoded_paths_in_test

2026-01-24T09:29:22Z

It indicates whether glibc was configured with --enable-hardcoded-path-in-tests. Reviewed-by: Adhemerval Zanella