Checking patch configure.ac...
error: while searching for:
)
LIBC_CONFIG_VAR([have-test-clangxx], [$libc_cv_test_clangxx])

LIBC_TRY_CC_AND_TEST_CC_OPTION([for -fstack-protector],
  [-Werror -fstack-protector],
  libc_cv_ssp,

error: patch failed: configure.ac:665
error: configure.ac: patch does not apply
Checking patch stdio-common/Makefile...
error: while searching for:
  # tests

# Clang 19 takes a very long time, it ran more than 27 minutes on Intel
# Core i7-1195G7 before the process was killed, to compile bug28.c:
# https://github.com/llvm/llvm-project/issues/120462
# Exclude it when Clang is used for testing.
ifneq ($(have-test-clang),yes)
tests += \
  bug28 \
  # tests

error: patch failed: stdio-common/Makefile:317
error: stdio-common/Makefile: patch does not apply