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Use AC_USE_SYSTEM_EXTENSIONS
[openafs.git] / src / cf / osconf.m4
diff --git a/src/cf/osconf.m4 b/src/cf/osconf.m4
index 1b45bd8..2622cf7 100644 (file)
--- a/src/cf/osconf.m4
+++ b/src/cf/osconf.m4
@@ -6,10 +6,9 @@ CFLAGS=
 XCFLAGS='${DBG} ${OPTMZ}'
 RXDEBUG="-DRXDEBUG"
 SHLIB_SUFFIX="so"
-CC="cc"
-CCOBJ="cc"
-MT_CC="cc"
-XLIBS="${LIB_AFSDB} ${XBSA_XLIBS}"
+CCOBJ="$CC"
+MT_CC="$CC"
+XLIBS="${LIB_AFSDB} ${XBSA_XLIBS} ${LIB_libintl}"
 
 dnl debugging and optimization flag defaults
 dnl Note, these are all the defaults for if debug/optimize turned on, and
@@ -39,6 +38,9 @@ dnl TODO - need to disable STRIP if we are doing debugging in any user space cod
 
 case $AFS_SYSNAME in
        alpha_dux40)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                LEX="lex"
                CSTATIC="-non_shared"
                DBG="-g3"
@@ -50,6 +52,9 @@ case $AFS_SYSNAME in
                ;;
 
        alpha_dux50)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                LEX="flex -l"
                DBG="-g3"
                CSTATIC="-non_shared"
@@ -61,6 +66,9 @@ case $AFS_SYSNAME in
                ;;
 
        alpha_dux51)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                LEX="flex -l"
                DBG="-g3"
                CSTATIC="-non_shared"
@@ -154,6 +162,7 @@ case $AFS_SYSNAME in
        hp_ux102)
                AS="/usr/ccs/bin/as"
                CC="/opt/ansic/bin/cc -Ae"
+               CCOBJ="/opt/ansic/bin/cc -Ae"
                DBM="/lib/libndbm.a"
                LD="/bin/ld"
                LEX="/opt/langtools/bin/lex"
@@ -363,9 +372,6 @@ case $AFS_SYSNAME in
                ;;
 
        i386_umlinux22)
-               CC="gcc -pipe"
-               CCOBJ="gcc -pipe"
-               MT_CC="gcc -pipe"
                KERN_OPTMZ=-O2
                LEX="flex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -pthread -D_REENTRANT ${XCFLAGS}'
@@ -381,9 +387,6 @@ case $AFS_SYSNAME in
                ;;
 
        i386_linux*)
-               CC="gcc -pipe"
-               CCOBJ="gcc -pipe"
-               MT_CC="gcc -pipe"
                KERN_OPTMZ=-O2
                LEX="flex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -pthread -D_REENTRANT ${XCFLAGS}'
@@ -402,9 +405,6 @@ case $AFS_SYSNAME in
                ;;
 
        i386_umlinux24)
-               CC="gcc -pipe"
-               CCOBJ="gcc -pipe"
-               MT_CC="gcc -pipe"
                KERN_OPTMZ=-O2
                LEX="flex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -pthread -D_REENTRANT ${XCFLAGS}'
@@ -424,9 +424,6 @@ case $AFS_SYSNAME in
                ;;
 
        i386_umlinux26)
-               CC="gcc -pipe"
-               CCOBJ="gcc -pipe"
-               MT_CC="gcc -pipe"
                KERN_OPTMZ=-O2
                LEX="flex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -pthread -D_REENTRANT ${XCFLAGS}'
@@ -476,67 +473,53 @@ case $AFS_SYSNAME in
                SHLIB_LINKER="${MT_CC} -shared"
                ;;
 
-       ppc_darwin_12)
-               AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration"
-               LEX="lex -l"
-               REGEX_OBJ="regex.o"
-               XCFLAGS="-traditional-cpp"
-               SHLIB_LINKER="${MT_CC} -dynamiclib"
-               SHLIB_SUFFIX="dylib"
-               ;;
-
-       ppc_darwin_13)
-               AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration"
-               LEX="lex -l"
-               LWP_OPTMZ="-O2"
-               REGEX_OBJ="regex.o"
-               XCFLAGS="-no-cpp-precomp"
-               SHLIB_LINKER="${MT_CC} -dynamiclib"
-               SHLIB_SUFFIX="dylib"
-               ;;
-
-       ppc_darwin_14)
-               AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration"
-               LEX="lex -l"
-               LWP_OPTMZ="-O2"
-               REGEX_OBJ="regex.o"
-               XCFLAGS="-no-cpp-precomp"
-               SHLIB_LINKER="${MT_CC} -dynamiclib"
-               SHLIB_SUFFIX="dylib"
-               ;;
-
-       ppc_darwin_60)
-               AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration"
+       ppc_darwin_70)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
+               AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration -framework SystemConfiguration -framework IOKit -framework CoreFoundation"
                LEX="lex -l"
+               MT_CFLAGS='-DAFS_PTHREAD_ENV -D_REENTRANT ${XCFLAGS}'
+               KROOT=
+               KINCLUDES='-I$(KROOT)/System/Library/Frameworks/Kernel.framework/Headers'
                LWP_OPTMZ="-O2"
                REGEX_OBJ="regex.o"
                XCFLAGS="-no-cpp-precomp"
                TXLIBS="-lncurses"
+               EXTRA_VLIBOBJS="fstab.o"
                SHLIB_LINKER="${MT_CC} -dynamiclib"
                SHLIB_SUFFIX="dylib"
+               XLIBS="${LIB_AFSDB} ${XBSA_XLIBS} -framework CoreFoundation"
                ;;
 
-       ppc_darwin_70)
+       *_darwin_80)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration -framework SystemConfiguration -framework IOKit -framework CoreFoundation"
                LEX="lex -l"
-               MT_CFLAGS='-DAFS_PTHREAD_ENV -D_REENTRANT ${XCFLAGS}'
+               MT_CFLAGS='-DAFS_PTHREAD_ENV -D_REENTRANT ${XCFLAGS} ${ARCHFLAGS}'
                KROOT=
                KINCLUDES='-I$(KROOT)/System/Library/Frameworks/Kernel.framework/Headers'
-               LWP_OPTMZ="-O2"
+               KERN_OPTMZ="-Os"
+               LWP_OPTMZ="-Os"
+               OPTMZ="-Os"
                REGEX_OBJ="regex.o"
-               XCFLAGS="-no-cpp-precomp"
                TXLIBS="-lncurses"
                EXTRA_VLIBOBJS="fstab.o"
                SHLIB_LINKER="${MT_CC} -dynamiclib"
                SHLIB_SUFFIX="dylib"
+               RANLIB="ranlib -c"
+               XLIBS="${LIB_AFSDB} ${XBSA_XLIBS} -framework CoreFoundation"
                ;;
 
-       *_darwin_80)
+       *_darwin_90)
                AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration -framework SystemConfiguration -framework IOKit -framework CoreFoundation"
                LEX="lex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -D_REENTRANT ${XCFLAGS} ${ARCHFLAGS}'
                KROOT=
                KINCLUDES='-I$(KROOT)/System/Library/Frameworks/Kernel.framework/Headers'
+               LD="cc"
                KERN_OPTMZ="-Os"
                LWP_OPTMZ="-Os"
                OPTMZ="-Os"
@@ -546,24 +529,28 @@ case $AFS_SYSNAME in
                SHLIB_LINKER="${MT_CC} -dynamiclib"
                SHLIB_SUFFIX="dylib"
                RANLIB="ranlib -c"
+               XLIBS="${LIB_AFSDB} ${XBSA_XLIBS} -framework CoreFoundation"
                ;;
 
-       *_darwin_90)
+       *_darwin_100)
                AFSD_LDFLAGS="-F/System/Library/PrivateFrameworks -framework DiskArbitration -framework SystemConfiguration -framework IOKit -framework CoreFoundation"
                LEX="lex -l"
                MT_CFLAGS='-DAFS_PTHREAD_ENV -D_REENTRANT ${XCFLAGS} ${ARCHFLAGS}'
+               MT_LIBS="${LIB_AFSDB} -framework CoreFoundation"
                KROOT=
                KINCLUDES='-I$(KROOT)/System/Library/Frameworks/Kernel.framework/Headers'
                LD="cc"
                KERN_OPTMZ="-Os"
                LWP_OPTMZ="-Os"
                OPTMZ="-Os"
+               PAM_LIBS="-lpam"
                REGEX_OBJ="regex.o"
                TXLIBS="-lncurses"
                EXTRA_VLIBOBJS="fstab.o"
                SHLIB_LINKER="${MT_CC} -dynamiclib"
                SHLIB_SUFFIX="dylib"
-               RANLIB="ranlib -c"
+               RANLIB="ranlib"
+               XLIBS="${LIB_AFSDB} ${XBSA_XLIBS} -framework CoreFoundation"
                ;;
 
        ppc_linux*)
@@ -582,6 +569,8 @@ case $AFS_SYSNAME in
                ;;
 
        rs_aix42)
+               CC="cc"
+               CCOBJ="cc"
                DBG=""
                LEX="lex"
                LIBSYS_AIX_EXP="afsl.exp"
@@ -591,7 +580,7 @@ case $AFS_SYSNAME in
                SHLIB_SUFFIX="o"
                TXLIBS="-lcurses"
                XCFLAGS="-K -D_NONSTD_TYPES -D_MBI=void"
-               XLIBS="${LIB_AFSDB} -ldl"
+               XLIBS="${LIB_AFSDB} ${LIB_libintl} -ldl"
                SHLIB_LINKER="${MT_CC} -bM:SRE -berok"
                AIX32=""
                AIX64="#"
@@ -599,6 +588,8 @@ case $AFS_SYSNAME in
 
 
        rs_aix51)
+               CC="cc"
+               CCOBJ="cc"
                DBG=""
                LEX="lex"
                LIBSYS_AIX_EXP="afsl.exp"
@@ -608,13 +599,15 @@ case $AFS_SYSNAME in
                SHLIB_SUFFIX="o"
                TXLIBS="-lcurses"
                XCFLAGS="-K -D_NONSTD_TYPES -D_MBI=void"
-               XLIBS="${LIB_AFSDB} -ldl"
+               XLIBS="${LIB_AFSDB} ${LIB_libintl} -ldl"
                SHLIB_LINKER="${MT_CC} -bM:SRE -berok"
                AIX32=""
                AIX64=""
                ;;
 
        rs_aix52)       
+               CC="cc"
+               CCOBJ="cc"
                DBG=""
                LEX="lex"
                LIBSYS_AIX_EXP="afsl.exp"
@@ -624,13 +617,15 @@ case $AFS_SYSNAME in
                SHLIB_SUFFIX="o"
                TXLIBS="-lcurses"
                XCFLAGS="-K -D_NONSTD_TYPES -D_MBI=void"
-               XLIBS="${LIB_AFSDB} -ldl"
+               XLIBS="${LIB_AFSDB} ${LIB_libintl} -ldl"
                SHLIB_LINKER="${MT_CC} -bM:SRE -berok"
                AIX32=""
                AIX64=""
                ;;
 
        rs_aix53)       
+               CC="cc"
+               CCOBJ="cc"
                DBG="-g"
                LEX="lex"
                LIBSYS_AIX_EXP="afsl.exp"
@@ -640,13 +635,15 @@ case $AFS_SYSNAME in
                SHLIB_SUFFIX="o"
                TXLIBS="-lcurses"
                XCFLAGS="-K -D_NONSTD_TYPES -D_MBI=void"
-               XLIBS="${LIB_AFSDB} -ldl"
+               XLIBS="${LIB_AFSDB} ${LIB_libintl} -ldl"
                SHLIB_LINKER="${MT_CC} -bM:SRE -berok"
                AIX32=""
                AIX64=""
                ;;
 
        rs_aix61)       
+               CC="cc"
+               CCOBJ="cc"
                DBG="-g"
                LEX="lex"
                LIBSYS_AIX_EXP="afsl.exp"
@@ -656,15 +653,13 @@ case $AFS_SYSNAME in
                SHLIB_SUFFIX="o"
                TXLIBS="-lcurses"
                XCFLAGS="-K -D_NONSTD_TYPES -D_MBI=void"
-               XLIBS="${LIB_AFSDB} -ldl"
+               XLIBS="${LIB_AFSDB} ${LIB_libintl} -ldl"
                SHLIB_LINKER="${MT_CC} -bM:SRE -berok"
                AIX32="#"
                AIX64=""
                ;;
 
        s390_linux22)
-               CC="gcc"
-               CCOBJ="gcc"
                LD="ld"
                KERN_OPTMZ=-O2
                LEX="flex -l"
@@ -683,8 +678,6 @@ case $AFS_SYSNAME in
                ;;
 
        s390_linux24|s390_linux26)
-               CC="gcc"
-               CCOBJ="gcc"
                LD="ld"
                KERN_OPTMZ=-O2
                LEX="flex -l"
@@ -702,8 +695,7 @@ case $AFS_SYSNAME in
                ;;
 
        s390x_linux24|s390x_linux26)
-               CC="gcc"
-               CCOBJ="gcc -fPIC"
+               CCOBJ="${CC} -fPIC"
                LD="ld"
                KERN_OPTMZ=-O2
                LEX="flex -l"
@@ -722,6 +714,9 @@ case $AFS_SYSNAME in
                ;;
 
        sgi_62)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                AFSD_LIBS="/usr/lib/libdwarf.a /usr/lib/libelf.a"
                FSINCLUDES="-I/usr/include/sys/fs"
                LEX="lex"
@@ -736,6 +731,9 @@ case $AFS_SYSNAME in
                ;;
 
        sgi_63)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                AFSD_LIBS="/usr/lib/libdwarf.a /usr/lib/libelf.a"
                FSINCLUDES="-I/usr/include/sys/fs"
                LEX="lex"
@@ -750,6 +748,9 @@ case $AFS_SYSNAME in
                ;;
 
        sgi_64)
+               CC="cc"
+               CCOBJ="cc"
+               MT_CC="cc"
                AFSD_LIBS="/usr/lib32/libdwarf.a /usr/lib32/libelf.a"
                FSINCLUDES="-I/usr/include/sys/fs"
                LEX="lex"
@@ -813,10 +814,10 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_55)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                SHLIB_CFLAGS="-KPIC"
@@ -831,10 +832,10 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_56)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -852,11 +853,11 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_57)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -874,11 +875,11 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_58)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -896,11 +897,11 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_59)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -918,11 +919,11 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_510)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -940,11 +941,11 @@ case $AFS_SYSNAME in
                ;;
 
        sun4x_511)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -962,11 +963,11 @@ case $AFS_SYSNAME in
                ;;
 
        sunx86_57)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -983,11 +984,11 @@ case $AFS_SYSNAME in
                ;;
 
        sunx86_58)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -1004,11 +1005,11 @@ case $AFS_SYSNAME in
                ;;
 
        sunx86_59)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -1025,11 +1026,11 @@ case $AFS_SYSNAME in
                ;;
 
        sunx86_510)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -1046,11 +1047,11 @@ case $AFS_SYSNAME in
                ;;
 
        sunx86_511)
-               CC="/opt/SUNWspro/bin/cc"
-               CCOBJ="/opt/SUNWspro/bin/cc"
+               CC=$SOLARISCC
+               CCOBJ=$SOLARISCC
                LEX="lex"
                LD="/usr/ccs/bin/ld"
-               MT_CC="/opt/SUNWspro/bin/cc"
+               MT_CC=$SOLARISCC
                MT_CFLAGS='-mt -DAFS_PTHREAD_ENV ${XCFLAGS}'
                MT_LIBS="-lpthread -lsocket"
                PAM_CFLAGS="-KPIC"
@@ -1083,18 +1084,6 @@ case $AFS_SYSNAME in
        ;;
 esac
 
-
-
-dnl pthreads fixes
-case $AFS_SYSNAME in
-dnl we'll go ahead and turn on XOPEN2K and ISO_C99
-dnl if this causes problems, we should scale back to _XOPEN_SOURCE=500
-       *linux*)
-               MT_CFLAGS="${MT_CFLAGS} -D_XOPEN_SOURCE=600 -D_BSD_SOURCE"
-       ;;
-esac
-
-
 dnl Disable the default for debugging/optimization if not enabled
 if test "x$enable_debug_kernel" = "xno"; then
   KERN_DBG=
@@ -1131,12 +1120,27 @@ else
   NO_STRIP_BIN=
 fi
 
-if test "x$enable_warnings" = "xyes"; then
-  if test "x$GCC" = "xyes"; then
-    XCFLAGS="${XCFLAGS} -Wall -Wstrict-prototypes -Wold-style-definition"
+CFLAGS_NOERROR=
+
+if test "x$GCC" = "xyes"; then
+  if test "x$enable_warnings" = "xyes"; then
+    XCFLAGS="${XCFLAGS} -Wall -Wstrict-prototypes -Wold-style-definition -Wpointer-arith"
+  fi
+  if test "x$enable_checking" != "xno"; then
+    XCFLAGS="${XCFLAGS} -Wall -Wstrict-prototypes -Wold-style-definition -Werror -fdiagnostics-show-option -Wpointer-arith"
+    if test "x$enable_checking" != "xall"; then
+      CFLAGS_NOERROR="-Wno-error"
+      AC_DEFINE(IGNORE_SOME_GCC_WARNINGS, 1, [define to disable some gcc warnings in warnings-as-errors mode])
+    fi
   fi
 fi
 
+if test "x$GCC" = "xyes"; then
+  CFLAGS_NOUNUSED="-Wno-unused"
+else
+  CFLAGS_NOUNUSED=
+fi
+
 dnl horribly cheating, assuming double / is ok.
 case $INSTALL in
   ./* ) 
@@ -1186,6 +1190,8 @@ AC_SUBST(SHLIB_SUFFIX)
 AC_SUBST(TXLIBS)
 AC_SUBST(VFSCK_CFLAGS)
 AC_SUBST(XCFLAGS)
+AC_SUBST(CFLAGS_NOERROR)
+AC_SUBST(CFLAGS_NOUNUSED)
 AC_SUBST(XCFLAGS64)
 AC_SUBST(XLDFLAGS)
 AC_SUBST(XLDFLAGS64)
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