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* configure.ac: Add --disable-posix-spawn option

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* maintMakefile: Add a test for the option
* src/job.c: Change HAVE_* preprocessor checks to USE_POSIX_SPAWN
This commit is contained in:
Paul Smith 2018-08-04 11:13:57 -04:00
parent 1129df27b8
commit a370268739
3 changed files with 29 additions and 7 deletions
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22
configure.ac
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@ -357,6 +357,22 @@ AS_IF([test "$ac_cv_func_lstat" = yes && test "$ac_cv_func_readlink" = yes],
[Define to 1 to enable symbolic link timestamp checking.])
])
# Use posix_spawn if we have support and the user didn't disable it
AC_ARG_ENABLE([posix-spawn],
AC_HELP_STRING([--disable-posix-spawn],
[disable support for posix_spawn()]),
[make_cv_posix_spawn="$enableval" user_posix_spawn="$enableval"],
[make_cv_posix_spawn="yes"])
AS_CASE([/$ac_cv_header_spawn/$ac_cv_func_posix_spawn/],
[*/no/*], [make_cv_posix_spawn=no])
AS_CASE([/$make_cv_posix_spawn/$user_posix_spawn/],
[*/no/*], [make_cv_posix_spawn=no],
[AC_DEFINE(USE_POSIX_SPAWN, 1, [Define to 1 to use posix_spawn().])
])
# Find the SCCS commands, so we can include them in our default rules.
AC_CACHE_CHECK([for location of SCCS get command], [make_cv_path_sccs_get], [
@ -498,6 +514,12 @@ AS_IF([test "x$make_cv_load" = xno && test "x$user_load" = xyes],
echo
])
AS_IF([test "x$make_cv_posix_spawn" = xno && test "x$user_posix_spawn" = xyes],
[ echo
echo "WARNING: posix_spawn() is not supported on this system."
echo
])
# Specify what files are to be created.
AC_CONFIG_FILES([Makefile lib/Makefile po/Makefile.in doc/Makefile \
tests/config-flags.pm])

1
maintMakefile
View File

@ -240,6 +240,7 @@ CONFIG_CHECKS := \
checkcfg.--disable-job-server \
checkcfg.--disable-load \
checkcfg.--without-guile \
checkcfg.--disable-posix-spawn \
checkcfg.make_cv_sys_gnu_glob^no \
checkcfg.ac_cv_func_getloadavg^no+ac_cv_have_decl_getloadavg^no+gl_cv_have_raw_decl_getloadavg^no+ac_cv_lib_util_getloadavg^no+ac_cv_lib_getloadavg_getloadavg^no \
checkcfg.CPPFLAGS^-DNO_OUTPUT_SYNC \

13
src/job.c
View File

@ -137,9 +137,9 @@ extern int wait3 ();
# endif /* Have wait3. */
#endif /* Have waitpid. */
#ifdef HAVE_SPAWN_H
#ifdef USE_POSIX_SPAWN
# include <spawn.h>
#endif /* have spawn.h */
#endif
#if !defined (wait) && !defined (POSIX)
int wait ();
@ -2234,13 +2234,13 @@ child_execute_job (struct output *out, int good_stdin, char **argv, char **envp)
const int fdin = good_stdin ? FD_STDIN : get_bad_stdin ();
int fdout = FD_STDOUT;
int fderr = FD_STDERR;
int r;
pid_t pid;
#if HAVE_POSIX_SPAWN
int r;
#if USE_POSIX_SPAWN
short flags = 0;
posix_spawnattr_t attr;
posix_spawn_file_actions_t fa;
#endif /* have posix_spawn() */
#endif
/* Divert child output if we want to capture it. */
if (out && out->syncout)
@ -2251,8 +2251,7 @@ child_execute_job (struct output *out, int good_stdin, char **argv, char **envp)
fderr = out->err;
}
#if ! HAVE_POSIX_SPAWN
/* does not have posix_spawn() */
#if !defined(USE_POSIX_SPAWN)
pid = vfork();
if (pid != 0)