Allow spl_config.h to be included by dependant packages (updated)

We need dependent packages to be able to include spl_config.h to
build properly.  This was partially solved in commit 0cbaeb1 by using
AH_BOTTOM to #undef common #defines (PACKAGE, VERSION, etc) which
autoconf always adds and cannot be easily removed.  This solution
works as long as the spl_config.h is included before your projects
config.h.  That turns out to be easier said than done.  In particular,
this is a problem when your package includes its config.h using the
-include gcc option which ensures the first thing included is your
config.h.

To handle all cases cleanly I have removed the AH_BOTTOM hack and
replaced it with an AC_CONFIG_HEADERS command.  This command runs
immediately after spl_config.h is written and with a little awk-foo
it strips the offending #defines from the file.  This eliminates
the problem entirely and makes header safe for inclusion.

Also in this change I have removed the few places in the code where
spl_config.h is included.  It is now added to the gcc compile line
to ensure the config results are always available.

Finally, I have also disabled the verbose kernel builds.  If you
want them back you can always build with 'make V=1'.  Since things
are working now they don't need to be on by default.

14 files changed, 97 insertions, 99 deletions

diff --git a/Makefile.am b/Makefile.am
index 97977d50e..8c4fed9c8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -9,8 +9,8 @@ endif
 SUBDIRS = $(USER_DIR) $(KERNEL_DIR)
 
 AUTOMAKE_OPTIONS = foreign dist-zip
-EXTRA_DIST = autogen.sh spl.spec.in META DISCLAIMER
-noinst_HEADERS = spl_config.h spl_unconfig.h
+EXTRA_DIST = autogen.sh spl.spec.in config/config.awk META DISCLAIMER
+noinst_HEADERS = spl_config.h
 
 distclean-local::
 	-$(RM) -R autom4te*.cache
diff --git a/Makefile.in b/Makefile.in
index a36b92677..d32ce8c53 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -211,8 +211,8 @@ target_vendor = @target_vendor@
 @CONFIG_KERNEL_TRUE@KERNEL_DIR = module include
 SUBDIRS = $(USER_DIR) $(KERNEL_DIR)
 AUTOMAKE_OPTIONS = foreign dist-zip
-EXTRA_DIST = autogen.sh spl.spec.in META DISCLAIMER
-noinst_HEADERS = spl_config.h spl_unconfig.h
+EXTRA_DIST = autogen.sh spl.spec.in config/config.awk META DISCLAIMER
+noinst_HEADERS = spl_config.h
 all: spl_config.h
 	$(MAKE) $(AM_MAKEFLAGS) all-recursive
 
diff --git a/cmd/Makefile.in b/cmd/Makefile.in
index 9ae0f0d51..375fb6815 100644
--- a/cmd/Makefile.in
+++ b/cmd/Makefile.in
@@ -198,7 +198,8 @@ target_alias = @target_alias@
 target_cpu = @target_cpu@
 target_os = @target_os@
 target_vendor = @target_vendor@
-DEFAULT_INCLUDES = -I${top_srcdir} -I${top_srcdir}/lib
+DEFAULT_INCLUDES = -include ${top_srcdir}/spl_config.h \
+	-I${top_srcdir}/lib
 AM_CFLAGS = -Wall -Wstrict-prototypes -Werror -Wshadow \
 	-D__USE_LARGEFILE64
 spl_SOURCES = spl.c
diff --git a/config/Rules.am b/config/Rules.am
index 255fa6c1b..4733e841d 100644
--- a/config/Rules.am
+++ b/config/Rules.am
@@ -1,4 +1,4 @@
-DEFAULT_INCLUDES = -I${top_srcdir}
+DEFAULT_INCLUDES = -include ${top_srcdir}/spl_config.h
 
 AM_CFLAGS  = -Wall -Wstrict-prototypes -Werror -Wshadow
 AM_CFLAGS += -D__USE_LARGEFILE64
diff --git a/config/config.awk b/config/config.awk
new file mode 100644
index 000000000..cc4b7cc26
--- /dev/null
+++ b/config/config.awk
@@ -0,0 +1,15 @@
+# Remove default preprocessor define's from config.h
+#   PACKAGE
+#   PACKAGE_BUGREPORT
+#   PACKAGE_NAME
+#   PACKAGE_STRING
+#   PACKAGE_TARNAME
+#   PACKAGE_VERSION
+#   STDC_HEADERS
+#   VERSION
+
+BEGIN { RS = "" ; FS = "\n" }     \
+	!/.#define PACKAGE./ &&   \
+	!/.#define VERSION./ &&   \
+	!/.#define STDC_HEADERS./ \
+	{ print $0"\n" }
diff --git a/config/spl-build.m4 b/config/spl-build.m4
index 9d0361028..0b387418e 100644
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -4,15 +4,12 @@ dnl #
 AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
 	SPL_AC_KERNEL
 
-	dnl # Kernel build make options
-	dnl # KERNELMAKE_PARAMS="V=1"   # Enable verbose module build
-	KERNELMAKE_PARAMS="V=1"
-
 	dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
 	dnl # compiler options are added by the kernel build system.
 	abs_srcdir=`readlink -f ${srcdir}`
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes -Werror"
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir} -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -include ${abs_srcdir}/spl_config.h"
 
 	if test "${LINUX_OBJ}" != "${LINUX}"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
diff --git a/configure b/configure
index 98b92a9d0..d9bf5c1d1 100755
--- a/configure
+++ b/configure
@@ -462,7 +462,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS SPL_META_NAME SPL_META_VERSION SPL_META_RELEASE SPL_META_ALIAS SPL_META_DATA SPL_META_AUTHOR SPL_META_LT_CURRENT SPL_META_LT_REVISION SPL_META_LT_AGE build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE SED EGREP LN_S ECHO AR ac_ct_AR RANLIB ac_ct_RANLIB CPP CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL LICENSE SPL_CONFIG LINUX LINUX_OBJ LINUX_VERSION LINUX_SYMBOLS KERNELMAKE_PARAMS KERNELCPPFLAGS CONFIG_USER_TRUE CONFIG_USER_FALSE CONFIG_KERNEL_TRUE CONFIG_KERNEL_FALSE LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS SPL_META_NAME SPL_META_VERSION SPL_META_RELEASE SPL_META_ALIAS SPL_META_DATA SPL_META_AUTHOR SPL_META_LT_CURRENT SPL_META_LT_REVISION SPL_META_LT_AGE build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE SED EGREP LN_S ECHO AR ac_ct_AR RANLIB ac_ct_RANLIB CPP CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL LICENSE SPL_CONFIG LINUX LINUX_OBJ LINUX_VERSION LINUX_SYMBOLS KERNELMAKE_PARAMS KERNELCPPFLAGS CONFIG_USER_TRUE CONFIG_USER_FALSE CONFIG_KERNEL_TRUE CONFIG_KERNEL_FALSE LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -1796,6 +1796,30 @@ test -n "$target_alias" &&
   test "$program_prefix$program_suffix$program_transform_name" = \
     NONENONEs,x,x, &&
   program_prefix=${target_alias}-
+echo "$as_me:$LINENO: checking whether to enable maintainer-specific portions of Makefiles" >&5
+echo $ECHO_N "checking whether to enable maintainer-specific portions of Makefiles... $ECHO_C" >&6
+    # Check whether --enable-maintainer-mode or --disable-maintainer-mode was given.
+if test "${enable_maintainer_mode+set}" = set; then
+  enableval="$enable_maintainer_mode"
+  USE_MAINTAINER_MODE=$enableval
+else
+  USE_MAINTAINER_MODE=no
+fi;
+  echo "$as_me:$LINENO: result: $USE_MAINTAINER_MODE" >&5
+echo "${ECHO_T}$USE_MAINTAINER_MODE" >&6
+
+
+if test $USE_MAINTAINER_MODE = yes; then
+  MAINTAINER_MODE_TRUE=
+  MAINTAINER_MODE_FALSE='#'
+else
+  MAINTAINER_MODE_TRUE='#'
+  MAINTAINER_MODE_FALSE=
+fi
+
+  MAINT=$MAINTAINER_MODE_TRUE
+
+
 am__api_version="1.9"
 # Find a good install program.  We prefer a C program (faster),
 # so one script is as good as another.  But avoid the broken or
@@ -2211,32 +2235,6 @@ am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'
           ac_config_headers="$ac_config_headers spl_config.h"
 
 
-
-echo "$as_me:$LINENO: checking whether to enable maintainer-specific portions of Makefiles" >&5
-echo $ECHO_N "checking whether to enable maintainer-specific portions of Makefiles... $ECHO_C" >&6
-    # Check whether --enable-maintainer-mode or --disable-maintainer-mode was given.
-if test "${enable_maintainer_mode+set}" = set; then
-  enableval="$enable_maintainer_mode"
-  USE_MAINTAINER_MODE=$enableval
-else
-  USE_MAINTAINER_MODE=no
-fi;
-  echo "$as_me:$LINENO: result: $USE_MAINTAINER_MODE" >&5
-echo "${ECHO_T}$USE_MAINTAINER_MODE" >&6
-
-
-if test $USE_MAINTAINER_MODE = yes; then
-  MAINTAINER_MODE_TRUE=
-  MAINTAINER_MODE_FALSE='#'
-else
-  MAINTAINER_MODE_TRUE='#'
-  MAINTAINER_MODE_FALSE=
-fi
-
-  MAINT=$MAINTAINER_MODE_TRUE
-
-
-
 # Find a good install program.  We prefer a C program (faster),
 # so one script is as good as another.  But avoid the broken or
 # incompatible versions:
@@ -3988,7 +3986,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 3991 "configure"' > conftest.$ac_ext
+  echo '#line 3989 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -5587,7 +5585,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:5590:" \
+echo "$as_me:5588:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -6650,11 +6648,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:6653: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6651: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:6657: \$? = $ac_status" >&5
+   echo "$as_me:6655: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -6918,11 +6916,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:6921: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6919: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:6925: \$? = $ac_status" >&5
+   echo "$as_me:6923: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -7022,11 +7020,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7025: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7023: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7029: \$? = $ac_status" >&5
+   echo "$as_me:7027: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8491,7 +8489,7 @@ linux*)
   libsuff=
   case "$host_cpu" in
   x86_64*|s390x*|powerpc64*)
-    echo '#line 8494 "configure"' > conftest.$ac_ext
+    echo '#line 8492 "configure"' > conftest.$ac_ext
     if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -9388,7 +9386,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 9391 "configure"
+#line 9389 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -9488,7 +9486,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 9491 "configure"
+#line 9489 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11831,11 +11829,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11834: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:11832: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:11838: \$? = $ac_status" >&5
+   echo "$as_me:11836: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -11935,11 +11933,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11938: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:11936: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:11942: \$? = $ac_status" >&5
+   echo "$as_me:11940: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -12471,7 +12469,7 @@ linux*)
   libsuff=
   case "$host_cpu" in
   x86_64*|s390x*|powerpc64*)
-    echo '#line 12474 "configure"' > conftest.$ac_ext
+    echo '#line 12472 "configure"' > conftest.$ac_ext
     if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -13529,11 +13527,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:13532: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:13530: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:13536: \$? = $ac_status" >&5
+   echo "$as_me:13534: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -13633,11 +13631,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:13636: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:13634: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:13640: \$? = $ac_status" >&5
+   echo "$as_me:13638: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -15082,7 +15080,7 @@ linux*)
   libsuff=
   case "$host_cpu" in
   x86_64*|s390x*|powerpc64*)
-    echo '#line 15085 "configure"' > conftest.$ac_ext
+    echo '#line 15083 "configure"' > conftest.$ac_ext
     if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -15860,11 +15858,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:15863: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:15861: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:15867: \$? = $ac_status" >&5
+   echo "$as_me:15865: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -16128,11 +16126,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16131: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16129: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:16135: \$? = $ac_status" >&5
+   echo "$as_me:16133: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -16232,11 +16230,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16235: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16233: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16239: \$? = $ac_status" >&5
+   echo "$as_me:16237: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -17701,7 +17699,7 @@ linux*)
   libsuff=
   case "$host_cpu" in
   x86_64*|s390x*|powerpc64*)
-    echo '#line 17704 "configure"' > conftest.$ac_ext
+    echo '#line 17702 "configure"' > conftest.$ac_ext
     if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -19078,11 +19076,10 @@ echo "${ECHO_T}$LINUX_SYMBOLS" >&6
 
 
 
-			KERNELMAKE_PARAMS="V=1"
-
 			abs_srcdir=`readlink -f ${srcdir}`
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes -Werror"
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir} -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -include ${abs_srcdir}/spl_config.h"
 
 	if test "${LINUX_OBJ}" != "${LINUX}"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
@@ -22430,11 +22427,10 @@ echo "${ECHO_T}$LINUX_SYMBOLS" >&6
 
 
 
-			KERNELMAKE_PARAMS="V=1"
-
 			abs_srcdir=`readlink -f ${srcdir}`
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes -Werror"
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir} -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir}/include"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -include ${abs_srcdir}/spl_config.h"
 
 	if test "${LINUX_OBJ}" != "${LINUX}"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
@@ -26389,6 +26385,9 @@ s,@target@,$target,;t t
 s,@target_cpu@,$target_cpu,;t t
 s,@target_vendor@,$target_vendor,;t t
 s,@target_os@,$target_os,;t t
+s,@MAINTAINER_MODE_TRUE@,$MAINTAINER_MODE_TRUE,;t t
+s,@MAINTAINER_MODE_FALSE@,$MAINTAINER_MODE_FALSE,;t t
+s,@MAINT@,$MAINT,;t t
 s,@INSTALL_PROGRAM@,$INSTALL_PROGRAM,;t t
 s,@INSTALL_SCRIPT@,$INSTALL_SCRIPT,;t t
 s,@INSTALL_DATA@,$INSTALL_DATA,;t t
@@ -26411,9 +26410,6 @@ s,@am__leading_dot@,$am__leading_dot,;t t
 s,@AMTAR@,$AMTAR,;t t
 s,@am__tar@,$am__tar,;t t
 s,@am__untar@,$am__untar,;t t
-s,@MAINTAINER_MODE_TRUE@,$MAINTAINER_MODE_TRUE,;t t
-s,@MAINTAINER_MODE_FALSE@,$MAINTAINER_MODE_FALSE,;t t
-s,@MAINT@,$MAINT,;t t
 s,@CC@,$CC,;t t
 s,@CFLAGS@,$CFLAGS,;t t
 s,@LDFLAGS@,$LDFLAGS,;t t
@@ -26945,6 +26941,13 @@ echo X$ac_file |
   	  /^X\(\/\/\)$/{ s//\1/; q; }
   	  /^X\(\/\).*/{ s//\1/; q; }
   	  s/.*/./; q'`/stamp-h$_am_stamp_count
+  # Run the commands associated with the file.
+  case $ac_file in
+    spl_config.h )
+	(mv spl_config.h spl_config.h.tmp &&
+	awk -f config/config.awk spl_config.h.tmp >spl_config.h &&
+	rm spl_config.h.tmp) || exit 1 ;;
+  esac
 done
 _ACEOF
 cat >>$CONFIG_STATUS <<\_ACEOF
diff --git a/configure.ac b/configure.ac
index ee6866509..4efd1c642 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,10 +29,12 @@ AC_LANG(C)
 SPL_AC_META
 AC_CONFIG_AUX_DIR([config])
 AC_CANONICAL_SYSTEM
-AM_INIT_AUTOMAKE([$SPL_META_NAME], [$SPL_META_VERSION])
-AC_CONFIG_HEADERS([spl_config.h])
-AH_BOTTOM([#include <spl_unconfig.h>])
 AM_MAINTAINER_MODE
+AM_INIT_AUTOMAKE([$SPL_META_NAME], [$SPL_META_VERSION])
+AC_CONFIG_HEADERS([spl_config.h], [
+	(mv spl_config.h spl_config.h.tmp &&
+	awk -f config/config.awk spl_config.h.tmp >spl_config.h &&
+	rm spl_config.h.tmp) || exit 1])
 
 AC_PROG_INSTALL
 AC_PROG_CC
diff --git a/include/sys/types.h b/include/sys/types.h
index 407a1b0c5..771e8f36e 100644
--- a/include/sys/types.h
+++ b/include/sys/types.h
@@ -7,7 +7,6 @@ extern "C" {
 
 #include <linux/types.h>
 #include <sys/sysmacros.h>
-#include <spl_config.h>
 
 #include <linux/uaccess_compat.h>
 #include <linux/file_compat.h>
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 992319d02..ad1fbd95e 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -192,7 +192,7 @@ target_alias = @target_alias@
 target_cpu = @target_cpu@
 target_os = @target_os@
 target_vendor = @target_vendor@
-DEFAULT_INCLUDES = -I${top_srcdir}
+DEFAULT_INCLUDES = -include ${top_srcdir}/spl_config.h
 AM_CFLAGS = -Wall -Wstrict-prototypes -Werror -Wshadow \
 	-D__USE_LARGEFILE64
 noinst_LTLIBRARIES = libcommon.la
diff --git a/lib/list.c b/lib/list.c
index 08b1f631f..fbee2d97d 100644
--- a/lib/list.c
+++ b/lib/list.c
@@ -25,10 +25,6 @@
  *****************************************************************************/
 
 
-#ifdef HAVE_CONFIG_H
-#  include <spl_config.h>
-#endif /* HAVE_CONFIG_H */
-
 #ifdef WITH_PTHREADS
 #  include <pthread.h>
 #endif /* WITH_PTHREADS */
diff --git a/module/spl/spl-generic.c b/module/spl/spl-generic.c
index a13b978cb..290c5275d 100644
--- a/module/spl/spl-generic.c
+++ b/module/spl/spl-generic.c
@@ -38,7 +38,6 @@
 #include <sys/utsname.h>
 #include <sys/file.h>
 #include <linux/kmod.h>
-#include "spl_config.h"
 
 #ifdef DEBUG_SUBSYSTEM
 #undef DEBUG_SUBSYSTEM
diff --git a/spl_config.h.in b/spl_config.h.in
index a820bccbb..3189756c2 100644
--- a/spl_config.h.in
+++ b/spl_config.h.in
@@ -251,5 +251,3 @@
 
 /* Version number of package */
 #undef VERSION
-
-#include <spl_unconfig.h>
diff --git a/spl_unconfig.h b/spl_unconfig.h
deleted file mode 100644
index b50a0be0c..000000000
--- a/spl_unconfig.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * Undefine these symbols to allow other autoheader enabled packages
- * to leverage the SPL configure checks without a header conflict.
- */
-#undef PACKAGE
-#undef PACKAGE_BUGREPORT
-#undef PACKAGE_NAME
-#undef PACKAGE_STRING
-#undef PACKAGE_TARNAME
-#undef PACKAGE_VERSION
-#undef VERSION
-#undef STDC_HEADERS