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Check for -Wno-unused-but-set-variable gcc support

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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 12c1acde76 and
79713039a2 for the reason the
-Wno-unused-but-set-variable options was originally added.
This commit is contained in:
Brian Behlendorf
2011-06-14 11:02:13 -07:00
parent 10715a0187
commit 8a7e1ceefa
57 changed files with 326 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/Makefile.in
+2
View File
@@ -70,6 +70,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -201,6 +202,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
cmd/mount_zfs/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -202,6 +203,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -306,7 +308,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zdb/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -203,6 +204,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -302,7 +304,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zfs/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -203,6 +204,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -302,7 +304,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zinject/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -203,6 +204,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -302,7 +304,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zpios/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -193,6 +194,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -292,7 +294,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zpool/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -204,6 +205,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -303,7 +305,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"
cmd/zpool_id/Makefile.in
+2
View File
@@ -72,6 +72,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -186,6 +187,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
cmd/zpool_layout/Makefile.in
+2
View File
@@ -72,6 +72,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -186,6 +187,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
cmd/ztest/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -203,6 +204,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -302,7 +304,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\" $(DEBUG_STACKFLAGS) \
cmd/zvol_id/Makefile.in
+3 -1
View File
@@ -73,6 +73,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/user-ioctl.m4 \
$(top_srcdir)/config/user-libblkid.m4 \
$(top_srcdir)/config/user-libuuid.m4 \
$(top_srcdir)/config/user-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/user-nptl_guard_within_stack.m4 \
$(top_srcdir)/config/user-selinux.m4 \
$(top_srcdir)/config/user-zlib.m4 $(top_srcdir)/config/user.m4 \
@@ -193,6 +194,7 @@ MAKEINFO = @MAKEINFO@
MKDIR_P = @MKDIR_P@
NM = @NM@
NMEDIT = @NMEDIT@
NO_UNUSED_BUT_SET_VARIABLE = @NO_UNUSED_BUT_SET_VARIABLE@
OBJDUMP = @OBJDUMP@
OBJEXT = @OBJEXT@
OTOOL = @OTOOL@
@@ -292,7 +294,7 @@ DEFAULT_INCLUDES = -include ${top_builddir}/zfs_config.h \
-I$(top_srcdir)/include -I$(top_srcdir)/lib/libspl/include
AM_LIBTOOLFLAGS = --silent
AM_CFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing \
-Wno-unused-but-set-variable ${DEBUG_CFLAGS} -D_GNU_SOURCE \
${NO_UNUSED_BUT_SET_VARIABLE} ${DEBUG_CFLAGS} -D_GNU_SOURCE \
-D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS \
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE \
-DTEXT_DOMAIN=\"zfs-linux-user\"