mirror_zfs/config/Rules.am

DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h

AM_LIBTOOLFLAGS = --silent
AM_CFLAGS  = -Wall -Wstrict-prototypes
AM_CFLAGS += -fno-strict-aliasing ${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS}
AM_CFLAGS += -D_GNU_SOURCE -D__EXTENSIONS__ -D_REENTRANT
AM_CFLAGS += -D_POSIX_PTHREAD_SEMANTICS -D_FILE_OFFSET_BITS=64
AM_CFLAGS += -D_LARGEFILE64_SOURCE -DTEXT_DOMAIN=\"zfs-linux-user\"
Support custom build directories and move includes One of the neat tricks an autoconf style project is capable of is allow configurion/building in a directory other than the source directory. The major advantage to this is that you can build the project various different ways while making changes in a single source tree. For example, this project is designed to work on various different Linux distributions each of which work slightly differently. This means that changes need to verified on each of those supported distributions perferably before the change is committed to the public git repo. Using nfs and custom build directories makes this much easier. I now have a single source tree in nfs mounted on several different systems each running a supported distribution. When I make a change to the source base I suspect may break things I can concurrently build from the same source on all the systems each in their own subdirectory. wget -c http://github.com/downloads/behlendorf/zfs/zfs-x.y.z.tar.gz tar -xzf zfs-x.y.z.tar.gz cd zfs-x-y-z ------------------------- run concurrently ---------------------- <ubuntu system> <fedora system> <debian system> <rhel6 system> mkdir ubuntu mkdir fedora mkdir debian mkdir rhel6 cd ubuntu cd fedora cd debian cd rhel6 ../configure ../configure ../configure ../configure make make make make make check make check make check make check This change also moves many of the include headers from individual incude/sys directories under the modules directory in to a single top level include directory. This has the advantage of making the build rules cleaner and logically it makes a bit more sense. 2010-09-05 00:26:23 +04:00			`DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h`
Add build system Add autoconf style build infrastructure to the ZFS tree. This includes autogen.sh, configure.ac, m4 macros, some scripts/*, and makefiles for all the core ZFS components. 2010-08-26 22:22:58 +04:00
			`AM_LIBTOOLFLAGS = --silent`
Set -Wno-unused-but-set-variable globally As of gcc-4.6 the option -Wunused-but-set-variable is enabled by default. While this is a useful warning there are numerous places in the ZFS code when a variable is set and then only checked in an ASSERT(). To avoid having to update every instance of this in the code we now set -Wno-unused-but-set-variable to suppress the warning. Additionally, when building with --enable-debug and -Werror set these warning also become fatal. We can reevaluate the suppression of these error at a later time if it becomes an issue. For now we are basically just reverting to the previous gcc behavior. 2011-04-19 21:39:31 +04:00			`AM_CFLAGS = -Wall -Wstrict-prototypes`
Check for -Wno-unused-but-set-variable gcc support Gcc versions 4.3.2 and earlier do not support the compiler flag -Wno-unused-but-set-variable. This can lead to build failures on older Linux platforms such as Debian Lenny. Since this is an optional build argument this changes add a new autoconf check for the option. If it is supported by the installed version of gcc then it is used otherwise it is omited. See commit's 12c1acde76683108441827ae9affba1872f3afe5 and 79713039a2b6e0ed223d141b4a8a8455f282d2f2 for the reason the -Wno-unused-but-set-variable options was originally added. 2011-06-14 22:02:13 +04:00			`AM_CFLAGS += -fno-strict-aliasing ${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS}`
Add build system Add autoconf style build infrastructure to the ZFS tree. This includes autogen.sh, configure.ac, m4 macros, some scripts/*, and makefiles for all the core ZFS components. 2010-08-26 22:22:58 +04:00			`AM_CFLAGS += -D_GNU_SOURCE -D__EXTENSIONS__ -D_REENTRANT`
			`AM_CFLAGS += -D_POSIX_PTHREAD_SEMANTICS -D_FILE_OFFSET_BITS=64`
			`AM_CFLAGS += -D_LARGEFILE64_SOURCE -DTEXT_DOMAIN=\"zfs-linux-user\"`