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Use the _ONCE variation of AC_CHECKs where applicable.

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When we're unconditionally looking for a function, or an header file,
without particular libraries set, or with found/not-found conditional code,
we can save ~1K lines in the final configure script by using the _ONCE
variant.

This makes sure that for each header of function, the check is done exactly
once and never more, reducing the amount of code that has to be generated
and executed.
This commit is contained in:
Diego Elio 'Flameeyes' Pettenò 2009-05-17 23:25:23 +02:00
parent ff5b7fb222
commit ce6643e8c9
1 changed files with 19 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

38
configure.ac
View file

@ -301,7 +301,7 @@ AM_CONDITIONAL(OS_IS_WIN32, test "x$os_is_win32" = "x1")
AC_HEADER_STDC
# POSIX
AC_CHECK_HEADERS([arpa/inet.h glob.h grp.h netdb.h netinet/in.h \
AC_CHECK_HEADERS_ONCE([arpa/inet.h glob.h grp.h netdb.h netinet/in.h \
netinet/in_systm.h netinet/tcp.h poll.h pwd.h sched.h \
sys/mman.h sys/resource.h sys/select.h sys/socket.h sys/wait.h \
sys/uio.h syslog.h sys/dl.h dlfcn.h linux/sockios.h])
@ -325,23 +325,23 @@ AC_CHECK_HEADERS([linux/input.h], [HAVE_EVDEV=1], [HAVE_EVDEV=0])
AM_CONDITIONAL([HAVE_EVDEV], [test "x$HAVE_EVDEV" = "x1"])
AC_CHECK_HEADERS([sys/prctl.h])
AC_CHECK_HEADERS_ONCE([sys/prctl.h])
# Solaris
AC_CHECK_HEADERS([sys/filio.h])
AC_CHECK_HEADERS_ONCE([sys/filio.h])
# Windows
AC_CHECK_HEADERS([windows.h winsock2.h ws2tcpip.h])
AC_CHECK_HEADERS_ONCE([windows.h winsock2.h ws2tcpip.h])
# NetBSD
AC_CHECK_HEADERS([sys/atomic.h])
AC_CHECK_HEADERS_ONCE([sys/atomic.h])
# Other
AC_CHECK_HEADERS([sys/ioctl.h])
AC_CHECK_HEADERS([byteswap.h])
AC_CHECK_HEADERS([sys/syscall.h])
AC_CHECK_HEADERS([sys/eventfd.h])
AC_CHECK_HEADERS([execinfo.h])
AC_CHECK_HEADERS_ONCE([sys/ioctl.h])
AC_CHECK_HEADERS_ONCE([byteswap.h])
AC_CHECK_HEADERS_ONCE([sys/syscall.h])
AC_CHECK_HEADERS_ONCE([sys/eventfd.h])
AC_CHECK_HEADERS_ONCE([execinfo.h])
#### Typdefs, structures, etc. ####
@ -395,13 +395,13 @@ AC_CHECK_FUNCS([getopt_long], [], [AC_CHECK_LIB([iberty], [getopt_long])])
#### Check for functions ####
# ISO
AC_CHECK_FUNCS([lrintf strtof])
AC_CHECK_FUNCS_ONCE([lrintf strtof])
# POSIX
AC_FUNC_FORK
AC_FUNC_GETGROUPS
AC_FUNC_SELECT_ARGTYPES
AC_CHECK_FUNCS([chmod chown clock_gettime getaddrinfo getgrgid_r getgrnam_r \
AC_CHECK_FUNCS_ONCE([chmod chown clock_gettime getaddrinfo getgrgid_r getgrnam_r \
getpwnam_r getpwuid_r gettimeofday getuid inet_ntop inet_pton mlock nanosleep \
pipe posix_fadvise posix_madvise posix_memalign setpgid setsid shm_open \
sigaction sleep sysconf pthread_setaffinity_np])
@ -410,20 +410,20 @@ AC_CHECK_FUNCS([mkfifo], [HAVE_MKFIFO=1], [HAVE_MKFIFO=0])
AM_CONDITIONAL(HAVE_MKFIFO, test "x$HAVE_MKFIFO" = "x1")
# X/OPEN
AC_CHECK_FUNCS([readlink])
AC_CHECK_FUNCS_ONCE([readlink])
# SUSv2
AC_CHECK_FUNCS([ctime_r usleep])
AC_CHECK_FUNCS_ONCE([ctime_r usleep])
# SUSv3
AC_CHECK_FUNCS([strerror_r])
AC_CHECK_FUNCS_ONCE([strerror_r])
# BSD
AC_CHECK_FUNCS([lstat])
AC_CHECK_FUNCS_ONCE([lstat])
# Non-standard
AC_CHECK_FUNCS([setresuid setresgid setreuid setregid seteuid setegid ppoll strsignal sig2str strtof_l])
AC_CHECK_FUNCS_ONCE([setresuid setresgid setreuid setregid seteuid setegid ppoll strsignal sig2str strtof_l])
AC_FUNC_ALLOCA
@ -456,7 +456,7 @@ AC_DEFINE_UNQUOTED(PA_CFLAGS,"$CFLAGS", [The CFLAGS used during compilation])
AC_SYS_LARGEFILE
# Check for open64 to know if the current system does have open64() and similar functions
AC_CHECK_FUNCS([open64])
AC_CHECK_FUNCS_ONCE([open64])
#### [lib]iconv ####
@ -535,7 +535,7 @@ fi
#### Valgrind (optional) ####
AC_CHECK_HEADERS([valgrind/memcheck.h])
AC_CHECK_HEADERS_ONCE([valgrind/memcheck.h])
#### Sound file ####