glibc/support/Makefile

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# Makefile for support library, used only at build and test time
# Copyright (C) 2016-2024 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
# <https://www.gnu.org/licenses/>.
subdir := support
include ../Makeconfig
extra-libs := libsupport
extra-libs-others = $(extra-libs)
extra-libs-noinstall := $(extra-libs)
libsupport-routines = \
blob_repeat \
check \
check_addrinfo \
check_dns_packet \
check_hostent \
check_netent \
delayed_exit \
dtotimespec \
dtotimespec-time64 \
ignore_stderr \
next_to_fault \
oom_error \
resolv_response_context_duplicate \
resolv_response_context_free \
resolv_test \
set_fortify_handler \
support-open-dev-null-range \
support-xfstat \
support-xfstat-time64 \
support-xstat \
support-xstat-time64 \
support_become_root \
support_can_chroot \
support_capture_subprocess \
support_capture_subprocess_check \
support_chroot \
support_copy_file \
support_copy_file_range \
support_create_timer \
support_descriptor_supports_holes \
support_descriptors \
support_enter_mount_namespace \
support_enter_network_namespace \
support_format_address_family \
support_format_addrinfo \
support_format_dns_packet \
support_format_herrno \
support_format_hostent \
support_format_netent \
support_isolate_in_subprocess \
support_mutex_pi_monotonic \
support_need_proc \
support_openpty \
io: Return UNSUPPORTED if filesystem do not support 64 bit timestamps Some Linux filesystems might not fully support 64 bit timestamps [1], which make some Linux specific tests to fail when they check for the functionality. This patch adds a new libsupport function, support_path_support_time64, that returns whether the target file supports or not 64 bit timestamps. The support is checked by issuing a utimensat and verifying both the last access and last modification time against a statx call. The tests that might fail are also adjusted to check the file support as well: $ dd if=/dev/zero of=loopbackfile.img bs=100M count=1 1+0 records in 1+0 records out 104857600 bytes (105 MB, 100 MiB) copied, 0,0589568 s, 1,8 GB/s $ sudo losetup -fP loopbackfile.img $ mkfs.xfs loopbackfile.img meta-data=loopbackfile.img isize=512 agcount=4, agsize=6400 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=1, rmapbt=0 = reflink=1 data = bsize=4096 blocks=25600, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=1368, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 $ mkdir loopfs $ sudo mount -o loop /dev/loop0 loopfs/ $ sudo chown -R azanella:azanella loopfs $ TMPDIR=loopfs/ ./testrun.sh misc/tst-utimes error: ../sysdeps/unix/sysv/linux/tst-utimes.c:55: File loopfs//utimesfECsK1 does not support 64-bit timestamps [1] https://bugzilla.redhat.com/show_bug.cgi?id=1795576
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support_path_support_time64 \
support_paths \
support_process_state \
support_ptrace \
support_quote_blob \
support_quote_blob_wide \
support_quote_string \
support_record_failure \
support_run_diff \
support_select_modifies_timeout \
support_select_normalizes_timeout \
support_set_small_thread_stack_size \
support_set_vma_name_supported \
support_shared_allocate \
support_small_stack_thread_attribute \
support_socket_so_timestamp_time64 \
support_stack_alloc \
support_stat_nanoseconds \
support_subprocess \
support_test_compare_blob \
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support_test_compare_failure \
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support_test_compare_string \
support_test_compare_string_wide \
support_test_main \
support_test_verify_impl \
support_wait_for_thread_exit \
support_write_file_string \
temp_file \
timespec \
timespec-add \
timespec-add-time64 \
timespec-sub \
timespec-sub-time64 \
timespec-time64 \
write_message \
xaccept \
xaccept4 \
xasprintf \
xbind \
xcalloc \
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xchdir \
xchmod \
xchroot \
xclock_gettime \
xclock_gettime_time64 \
xclock_settime \
xclock_settime_time64 \
xclone \
xclose \
xconnect \
xcopy_file_range \
xdlfcn \
xdlmopen \
xdup2 \
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xfchmod \
xfclose \
xfgets \
xfopen \
xfork \
xfread \
C2x scanf binary constant handling C2x adds binary integer constants starting with 0b or 0B, and supports those constants for the %i scanf format (in addition to the %b format, which isn't yet implemented for scanf in glibc). Implement that scanf support for glibc. As with the strtol support, this is incompatible with previous C standard versions, in that such an input string starting with 0b or 0B was previously required to be parsed as 0 (with the rest of the input potentially matching subsequent parts of the scanf format string). Thus this patch adds 12 new __isoc23_* functions per long double format (12, 24 or 36 depending on how many long double formats the glibc configuration supports), with appropriate header redirection support (generally very closely following that for the __isoc99_* scanf functions - note that __GLIBC_USE (DEPRECATED_SCANF) takes precedence over __GLIBC_USE (C2X_STRTOL), so the case of GNU extensions to C89 continues to get old-style GNU %a and does not get this new feature). The function names would remain as __isoc23_* even if C2x ends up published in 2024 rather than 2023. When scanf %b support is added, I think it will be appropriate for all versions of scanf to follow C2x rules for inputs to the %b format (given that there are no compatibility concerns for a new format). Tested for x86_64 (full glibc testsuite). The first version was also tested for powerpc (32-bit) and powerpc64le (stdio-common/ and wcsmbs/ tests), and with build-many-glibcs.py.
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xfreopen \
xftruncate \
xgetline \
xgetpeername \
xgetsockname \
xlisten \
xlseek \
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xlstat \
xlstat-time64 \
xmalloc \
xmemstream \
xmkdir \
xmkdirp \
xmkfifo \
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xmmap \
xmprotect \
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xmunmap \
xnewlocale \
xopen \
xpipe \
xpoll \
xposix_memalign \
xposix_spawn \
xposix_spawn_file_actions_addclose \
xposix_spawn_file_actions_adddup2 \
xpthread_attr_destroy \
xpthread_attr_init \
xpthread_attr_setaffinity_np \
xpthread_attr_setdetachstate \
nptl: Invert the mmap/mprotect logic on allocated stacks (BZ#18988) Current allocate_stack logic for create stacks is to first mmap all the required memory with the desirable memory and then mprotect the guard area with PROT_NONE if required. Although it works as expected, it pessimizes the allocation because it requires the kernel to actually increase commit charge (it counts against the available physical/swap memory available for the system). The only issue is to actually check this change since side-effects are really Linux specific and to actually account them it would require a kernel specific tests to parse the system wide information. On the kernel I checked /proc/self/statm does not show any meaningful difference for vmm and/or rss before and after thread creation. I could only see really meaningful information checking on system wide /proc/meminfo between thread creation: MemFree, MemAvailable, and Committed_AS shows large difference without the patch. I think trying to use these kind of information on a testcase is fragile. The BZ#18988 reports shows that the commit pages are easily seen with mlockall (MCL_FUTURE) (with lock all pages that become mapped in the process) however a more straighfoward testcase shows that pthread_create could be faster using this patch: -- static const int inner_count = 256; static const int outer_count = 128; static void *thread1(void *arg) { return NULL; } static void *sleeper(void *arg) { pthread_t ts[inner_count]; for (int i = 0; i < inner_count; i++) pthread_create (&ts[i], &a, thread1, NULL); for (int i = 0; i < inner_count; i++) pthread_join (ts[i], NULL); return NULL; } int main(void) { pthread_attr_init(&a); pthread_attr_setguardsize(&a, 1<<20); pthread_attr_setstacksize(&a, 1134592); pthread_t ts[outer_count]; for (int i = 0; i < outer_count; i++) pthread_create(&ts[i], &a, sleeper, NULL); for (int i = 0; i < outer_count; i++) pthread_join(ts[i], NULL); assert(r == 0); } return 0; } -- On x86_64 (4.4.0-45-generic, gcc 5.4.0) running the small benchtests I see: $ time ./test real 0m3.647s user 0m0.080s sys 0m11.836s While with the patch I see: $ time ./test real 0m0.696s user 0m0.040s sys 0m1.152s So I added a pthread_create benchtest (thread_create) which check the thread creation latency. As for the simple benchtests, I saw improvements in thread creation on all architectures I tested the change. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu, sparc64-linux-gnu, and sparcv9-linux-gnu. [BZ #18988] * benchtests/thread_create-inputs: New file. * benchtests/thread_create-source.c: Likewise. * support/xpthread_attr_setguardsize.c: Likewise. * support/Makefile (libsupport-routines): Add xpthread_attr_setguardsize object. * support/xthread.h: Add xpthread_attr_setguardsize prototype. * benchtests/Makefile (bench-pthread): Add thread_create. * nptl/allocatestack.c (allocate_stack): Call mmap with PROT_NONE and then mprotect the required area.
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xpthread_attr_setguardsize \
xpthread_attr_setstack \
xpthread_attr_setstacksize \
xpthread_barrier_destroy \
xpthread_barrier_init \
xpthread_barrier_wait \
xpthread_barrierattr_destroy \
xpthread_barrierattr_init \
xpthread_barrierattr_setpshared \
xpthread_cancel \
xpthread_check_return \
xpthread_cond_signal \
xpthread_cond_wait \
xpthread_create \
xpthread_detach \
xpthread_join \
xpthread_key_create \
xpthread_key_delete \
xpthread_kill \
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xpthread_mutex_consistent \
xpthread_mutex_destroy \
xpthread_mutex_init \
xpthread_mutex_lock \
xpthread_mutex_unlock \
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xpthread_mutexattr_destroy \
xpthread_mutexattr_init \
xpthread_mutexattr_setprotocol \
xpthread_mutexattr_setpshared \
xpthread_mutexattr_setrobust \
xpthread_mutexattr_settype \
xpthread_once \
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xpthread_rwlock_destroy \
xpthread_rwlock_init \
xpthread_rwlock_rdlock \
xpthread_rwlock_unlock \
xpthread_rwlock_wrlock \
xpthread_rwlockattr_init \
xpthread_rwlockattr_setkind_np \
xpthread_sigmask \
xpthread_spin_lock \
xpthread_spin_unlock \
xraise \
xread \
xreadlink \
xrealloc \
xrecvfrom \
xsendto \
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xsetlocale \
xsetsockopt \
xsigaction \
xsignal \
xsigstack \
xsocket \
xstrdup \
xstrndup \
xsymlink \
xsysconf \
xsystem \
xunlink \
xuselocale \
xwaitpid \
xwrite \
# libsupport-routines
libsupport-static-only-routines := $(libsupport-routines)
# Only build one variant of the library.
libsupport-inhibit-o := .os
ifeq ($(build-shared),yes)
libsupport-inhibit-o += .o
endif
CFLAGS-support_paths.c = \
-DSRCDIR_PATH=\"`cd .. ; pwd`\" \
-DOBJDIR_PATH=\"`cd $(objpfx)/..; pwd`\" \
-DOBJDIR_ELF_LDSO_PATH=\"`cd $(objpfx)/..; pwd`/elf/$(rtld-installed-name)\" \
-DINSTDIR_PATH=\"$(prefix)\" \
-DLIBDIR_PATH=\"$(libdir)\" \
-DBINDIR_PATH=\"$(bindir)\" \
-DSBINDIR_PATH=\"$(sbindir)\" \
-DSLIBDIR_PATH=\"$(slibdir)\" \
-DROOTSBINDIR_PATH=\"$(rootsbindir)\" \
-DCOMPLOCALEDIR_PATH=\"$(complocaledir)\" \
-DSYSCONFDIR_PATH=\"$(sysconfdir)\"
# Build with exception handling and asynchronous unwind table support.
CFLAGS-.oS += -fexceptions -fasynchronous-unwind-tables
# In support_timespec_check_in_range we may be passed a very tight
# range for which we should produce a correct result for expected
# being within the observed range. The code uses double internally
# in support_timespec_check_in_range and for that computation we use
# -fexcess-precision=standard.
CFLAGS-timespec.c += -fexcess-precision=standard
CFLAGS-timespec-time64.c += -fexcess-precision=standard
# Ensure that general support files use 64-bit time_t
CFLAGS-delayed_exit.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-shell-container.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_can_chroot.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_copy_file.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_copy_file_range.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_descriptor_supports_holes.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_descriptors.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_process_state.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_stat_nanoseconds.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_subprocess.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-support_test_main.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-test-container.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
CFLAGS-xmkdirp.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
# This is required to get an mkstemp which can create large files on some
# 32-bit platforms.
CFLAGS-temp_file.c += -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64
ifeq (,$(CXX))
LINKS_DSO_PROGRAM = links-dso-program-c
else
LINKS_DSO_PROGRAM = links-dso-program
LDLIBS-links-dso-program = -lstdc++ -lgcc -lgcc_s $(libunwind)
endif
ifeq (yes,$(have-selinux))
LDLIBS-$(LINKS_DSO_PROGRAM) += -lselinux
endif
LDLIBS-test-container = $(libsupport)
others += test-container
others-noinstall += test-container
others += \
echo-container \
shell-container \
true-container \
# others
others-noinstall += \
echo-container \
shell-container \
true-container \
# others-noinstall
others += $(LINKS_DSO_PROGRAM)
others-noinstall += $(LINKS_DSO_PROGRAM)
elf: Testing infrastructure for ld.so DSO sorting (BZ #17645) This is the first of a 2-part patch set that fixes slow DSO sorting behavior in the dynamic loader, as reported in BZ #17645. In order to facilitate such a large modification to the dynamic loader, this first patch implements a testing framework for validating shared object sorting behavior, to enable comparison between old/new sorting algorithms, and any later enhancements. This testing infrastructure consists of a Python script scripts/dso-ordering-test.py' which takes in a description language, consisting of strings that describe a set of link dependency relations between DSOs, and generates testcase programs and Makefile fragments to automatically test the described situation, for example: a->b->c->d # four objects linked one after another a->[bc]->d;b->c # a depends on b and c, which both depend on d, # b depends on c (b,c linked to object a in fixed order) a->b->c;{+a;%a;-a} # a, b, c serially dependent, main program uses # dlopen/dlsym/dlclose on object a a->b->c;{}!->[abc] # a, b, c serially dependent; multiple tests generated # to test all permutations of a, b, c ordering linked # to main program (Above is just a short description of what the script can do, more documentation is in the script comments.) Two files containing several new tests, elf/dso-sort-tests-[12].def are added, including test scenarios for BZ #15311 and Redhat issue #1162810 [1]. Due to the nature of dynamic loader tests, where the sorting behavior and test output occurs before/after main(), generating testcases to use support/test-driver.c does not suffice to control meaningful timeout for ld.so. Therefore a new utility program 'support/test-run-command', based on test-driver.c/support_test_main.c has been added. This does the same testcase control, but for a program specified through a command-line rather than at the source code level. This utility is used to run the dynamic loader testcases generated by dso-ordering-test.py. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1162810 Signed-off-by: Chung-Lin Tang <cltang@codesourcery.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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others += test-run-command
others-static += test-run-command
others-noinstall += test-run-command
LDLIBS-test-run-command = $(libsupport)
$(objpfx)test-container : $(libsupport)
$(objpfx)shell-container : $(libsupport)
$(objpfx)echo-container : $(libsupport)
$(objpfx)true-container : $(libsupport)
elf: Testing infrastructure for ld.so DSO sorting (BZ #17645) This is the first of a 2-part patch set that fixes slow DSO sorting behavior in the dynamic loader, as reported in BZ #17645. In order to facilitate such a large modification to the dynamic loader, this first patch implements a testing framework for validating shared object sorting behavior, to enable comparison between old/new sorting algorithms, and any later enhancements. This testing infrastructure consists of a Python script scripts/dso-ordering-test.py' which takes in a description language, consisting of strings that describe a set of link dependency relations between DSOs, and generates testcase programs and Makefile fragments to automatically test the described situation, for example: a->b->c->d # four objects linked one after another a->[bc]->d;b->c # a depends on b and c, which both depend on d, # b depends on c (b,c linked to object a in fixed order) a->b->c;{+a;%a;-a} # a, b, c serially dependent, main program uses # dlopen/dlsym/dlclose on object a a->b->c;{}!->[abc] # a, b, c serially dependent; multiple tests generated # to test all permutations of a, b, c ordering linked # to main program (Above is just a short description of what the script can do, more documentation is in the script comments.) Two files containing several new tests, elf/dso-sort-tests-[12].def are added, including test scenarios for BZ #15311 and Redhat issue #1162810 [1]. Due to the nature of dynamic loader tests, where the sorting behavior and test output occurs before/after main(), generating testcases to use support/test-driver.c does not suffice to control meaningful timeout for ld.so. Therefore a new utility program 'support/test-run-command', based on test-driver.c/support_test_main.c has been added. This does the same testcase control, but for a program specified through a command-line rather than at the source code level. This utility is used to run the dynamic loader testcases generated by dso-ordering-test.py. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1162810 Signed-off-by: Chung-Lin Tang <cltang@codesourcery.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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$(objpfx)test-run-command : $(libsupport) $(common-objpfx)elf/static-stubs.o
tests = \
README-testing \
tst-support-namespace \
tst-support-open-dev-null-range \
tst-support-process_state \
tst-support_blob_repeat \
tst-support_capture_subprocess \
tst-support_descriptors \
tst-support_format_dns_packet \
tst-support_quote_blob \
tst-support_quote_blob_wide \
tst-support_quote_string \
tst-support_record_failure \
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tst-test_compare \
tst-test_compare_blob \
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tst-test_compare_string \
tst-test_compare_string_wide \
tst-timespec \
tst-xreadlink \
tst-xsigstack \
# tests
ifeq ($(run-built-tests),yes)
tests-special = \
$(objpfx)tst-support_record_failure-2.out
$(objpfx)tst-support_record_failure-2.out: tst-support_record_failure-2.sh \
$(objpfx)tst-support_record_failure
$(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
'$(run-program-env)' '$(test-program-prefix-after-env)' \
> $@; \
$(evaluate-test)
endif
tests-special += $(objpfx)tst-glibcpp.out
$(objpfx)tst-glibcpp.out: tst-glibcpp.py $(..)scripts/glibcpp.py
PYTHONPATH=$(..)scripts $(PYTHON) tst-glibcpp.py > $@ 2>&1; \
$(evaluate-test)
$(objpfx)tst-support_format_dns_packet: $(common-objpfx)resolv/libresolv.so
tst-support_capture_subprocess-ARGS = -- $(host-test-program-cmd)
include ../Rules