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7ab022f6e6
Hi, This patch implements pex_unix_exec_child using posix_spawn when available. This should especially benefit recent macOS (where vfork just calls fork), but should have equivalent or faster performance on all platforms. In addition, the implementation is substantially simpler than the vfork+exec code path. Tested on x86_64-linux. v2: Fix error handling (previously the function would be run twice in case of error), and don't use a macro that changes control flow. v3: Match file style for error-handling blocks, don't close in/out/errdes on error, and check close() for errors. libiberty/ * configure.ac (AC_CHECK_HEADERS): Add spawn.h. (checkfuncs): Add posix_spawn, posix_spawnp. (AC_CHECK_FUNCS): Add posix_spawn, posix_spawnp. * aclocal.m4, configure, config.in: Rebuild. * pex-unix.c [HAVE_POSIX_SPAWN] (pex_unix_exec_child): New function.
22 lines
902 B
Plaintext
22 lines
902 B
Plaintext
# generated automatically by aclocal 1.16.5 -*- Autoconf -*-
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# Copyright (C) 1996-2021 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE.
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m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
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m4_include([../config/acx.m4])
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m4_include([../config/cet.m4])
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m4_include([../config/enable.m4])
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m4_include([../config/no-executables.m4])
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m4_include([../config/picflag.m4])
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m4_include([../config/warnings.m4])
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m4_include([acinclude.m4])
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