Support building bits/syscall.h for any number of subarch variants.

diff --git a/ChangeLog b/ChangeLog
index a9cdf76..f74e0a5 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,31 @@
+2011-12-22  Joseph Myers  <joseph@codesourcery.com>
+
+       * sysdeps/unix/sysv/linux/Makefile (syscall-list-variants)
+       (syscall-list-default-options, syscall-list-default-condition)
+       (syscall-list-includes): Define.
+       ($(objpfx)syscall-%.h $(objpfx)syscall-%.d): Support arbitrary
+       list of ABIs and options and #if conditions for each ABI.  Do not
+       handle common syscalls between ABIs specially.
+       * sysdeps/unix/sysv/linux/powerpc/Makefile (64bit-predefine):
+       Remove.
+       (syscall-list-variants, syscall-list-32bit-options)
+       (syscall-list-32bit-condition, syscall-list-64bit-options)
+       (syscall-list-64bit-condition): Define.
+       * sysdeps/unix/sysv/linux/s390/Makefile (64bit-predefine): Remove.
+       (syscall-list-variants, syscall-list-32bit-options)
+       (syscall-list-32bit-condition, syscall-list-64bit-options)
+       (syscall-list-64bit-condition): Define.
+       * sysdeps/unix/sysv/linux/sparc/Makefile (64bit-predefine):
+       Remove.
+       (syscall-list-variants, syscall-list-32bit-options)
+       (syscall-list-32bit-condition, syscall-list-64bit-options)
+       (syscall-list-64bit-condition): Define.
+       * sysdeps/unix/sysv/linux/x86_64/Makefile (64bit-predefine):
+       Remove.
+       (syscall-list-variants, syscall-list-32bit-options)
+       (syscall-list-32bit-condition, syscall-list-64bit-options)
+       (syscall-list-64bit-condition): Define.
+
 2011-12-22  Ulrich Drepper  <drepper@gmail.com>
 
        * locale/iso-639.def: Add brx entry.

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 3032026..e684b16 100644 (file)
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -39,8 +39,27 @@ install-others += $(inst_includedir)/bits/syscall.h
 tests += tst-clone
 
 # Generate the list of SYS_* macros for the system calls (__NR_* macros).
-# For bi-arch platforms, the CPU/Makefile defines {32,64}bit-predefine and
-# we generate a file that uses <bits/wordsize.h>.
+
+# If there is more than one syscall list for different architecture
+# variants, the CPU/Makefile defines syscall-list-variants to be a
+# list of names for those variants (e.g. 32bit 64bit), and, for each
+# variant, defines syscall-list-$(variant)-options to be compiler
+# options to cause <asm/unistd.h> to define the desired list of
+# syscalls and syscall-list-$(variant)-condition to be the condition
+# for those options to use in a C #if condition.
+# syscall-list-includes may be defined to a list of headers to include
+# in the generated header, if the default does not suffice.
+
+ifndef syscall-list-variants
+syscall-list-variants := default
+syscall-list-default-options :=
+syscall-list-default-condition :=
+endif
+
+ifndef syscall-list-includes
+syscall-list-includes := bits/wordsize.h
+endif
+
 $(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/sys/syscall.h
        $(make-target-directory)
        { \
@@ -50,37 +69,30 @@ $(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/sys/syscal
         echo '# error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."'; \
         echo '#endif'; \
         echo ''; \
-        $(CC) -E -MD -MP -MF $(@:.h=.d)-t1 -MT '$(@:.d=.h) $(@:.h=.d)' \
-              -x c $(sysincludes) $< $(addprefix -U,$(64bit-predefine)) \
-              $(addprefix -D,$(32bit-predefine)) -D_LIBC -dM | \
-        sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
-        LC_ALL=C sort > $(@:.d=.h).new32; \
-        $(CC) -E -MD -MP -MF $(@:.h=.d)-t2 -MT '$(@:.d=.h) $(@:.h=.d)' \
-              -x c $(sysincludes) $< $(addprefix -U,$(32bit-predefine)) \
-              $(addprefix -D,$(64bit-predefine)) -D_LIBC -dM | \
+        $(foreach h,$(syscall-list-includes), echo '#include <$(h)>';) \
+        echo ''; \
+        $(foreach v,$(syscall-list-variants),\
+        $(CC) -E -MD -MP -MF $(@:.h=.d)-t$(v) -MT '$(@:.d=.h) $(@:.h=.d)' \
+              -x c $(sysincludes) $< $(syscall-list-$(v)-options) \
+              -D_LIBC -dM | \
         sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
-        LC_ALL=C sort > $(@:.d=.h).new64; \
-        if cmp -s $(@:.d=.h).new32 $(@:.d=.h).new64; then \
-          cat $(@:.d=.h).new32; \
-        else \
-          echo '#include <bits/wordsize.h>'; \
-          echo ''; \
-          LC_ALL=C comm -12 $(@:.d=.h).new32 $(@:.d=.h).new64; \
-          echo '#if __WORDSIZE == 64'; \
-          LC_ALL=C comm -13 $(@:.d=.h).new32 $(@:.d=.h).new64; \
-          echo '#else'; \
-          LC_ALL=C comm -23 $(@:.d=.h).new32 $(@:.d=.h).new64; \
-          echo '#endif'; \
-        fi; \
-        rm -f $(@:.d=.h).new32 $(@:.d=.h).new64; \
+        LC_ALL=C sort > $(@:.d=.h).new$(v); \
+        $(if $(syscall-list-$(v)-condition),\
+        echo '#if $(syscall-list-$(v)-condition)';) \
+        cat $(@:.d=.h).new$(v); \
+        $(if $(syscall-list-$(v)-condition),echo '#endif';) \
+        rm -f $(@:.d=.h).new$(v); \
+        ) \
        } > $(@:.d=.h).new
        mv -f $(@:.d=.h).new $(@:.d=.h)
 ifneq (,$(objpfx))
-       sed $(sed-remove-objpfx) $(@:.h=.d)-t1 $(@:.h=.d)-t2 > $(@:.h=.d)-t3
+       sed $(sed-remove-objpfx) \
+        $(foreach v,$(syscall-list-variants),$(@:.h=.d)-t$(v)) > $(@:.h=.d)-t3
 else
-       cat $(@:.h=.d)-t1 $(@:.h=.d)-t2 > $(@:.h=.d)-t3
+       cat $(foreach v,$(syscall-list-variants),$(@:.h=.d)-t$(v)) \
+        > $(@:.h=.d)-t3
 endif
-       rm -f $(@:.h=.d)-t1 $(@:.h=.d)-t2
+       rm -f $(foreach v,$(syscall-list-variants),$(@:.h=.d)-t$(v))
        mv -f $(@:.h=.d)-t3 $(@:.h=.d)
 
 $(inst_includedir)/bits/syscall.h: $(objpfx)syscall-list.h $(+force)

diff --git a/sysdeps/unix/sysv/linux/powerpc/Makefile b/sysdeps/unix/sysv/linux/powerpc/Makefile
index d1281cf..55311a4 100644 (file)
--- a/sysdeps/unix/sysv/linux/powerpc/Makefile
+++ b/sysdeps/unix/sysv/linux/powerpc/Makefile
@@ -1,4 +1,9 @@
-64bit-predefine = __powerpc64__
+syscall-list-variants := 32bit 64bit
+syscall-list-32bit-options := -U__powerpc64__
+syscall-list-32bit-condition := __WORDSIZE == 32
+syscall-list-64bit-options := -D__powerpc64__
+syscall-list-64bit-condition := __WORDSIZE == 64
+
 ifeq ($(subdir),rt)
 librt-routines += rt-sysdep
 endif

diff --git a/sysdeps/unix/sysv/linux/s390/Makefile b/sysdeps/unix/sysv/linux/s390/Makefile
index 72eae68..fb20fb0 100644 (file)
--- a/sysdeps/unix/sysv/linux/s390/Makefile
+++ b/sysdeps/unix/sysv/linux/s390/Makefile
@@ -1,4 +1,9 @@
-64bit-predefine = __s390x__
+syscall-list-variants := 32bit 64bit
+syscall-list-32bit-options := -U__s390x__
+syscall-list-32bit-condition := __WORDSIZE == 32
+syscall-list-64bit-options := -D__s390x__
+syscall-list-64bit-condition := __WORDSIZE == 64
+
 ifeq ($(subdir),rt)
 librt-routines += rt-sysdep
 endif

diff --git a/sysdeps/unix/sysv/linux/sparc/Makefile b/sysdeps/unix/sysv/linux/sparc/Makefile
index 9cb2a63..96bf0bb 100644 (file)
--- a/sysdeps/unix/sysv/linux/sparc/Makefile
+++ b/sysdeps/unix/sysv/linux/sparc/Makefile
@@ -1,4 +1,8 @@
-64bit-predefine = __sparc_v9__ __arch64__
+syscall-list-variants := 32bit 64bit
+syscall-list-32bit-options := -U__sparc_v9__ -U__arch64__
+syscall-list-32bit-condition := __WORDSIZE == 32
+syscall-list-64bit-options := -D__sparc_v9__ -D__arch64__
+syscall-list-64bit-condition := __WORDSIZE == 64
 
 ifeq ($(subdir),rt)
 librt-routines += rt-sysdep

diff --git a/sysdeps/unix/sysv/linux/x86_64/Makefile b/sysdeps/unix/sysv/linux/x86_64/Makefile
index 6e2741a..9c9e615 100644 (file)
--- a/sysdeps/unix/sysv/linux/x86_64/Makefile
+++ b/sysdeps/unix/sysv/linux/x86_64/Makefile
@@ -1,5 +1,8 @@
-32bit-predefine = __i386__
-64bit-predefine = __x86_64__
+syscall-list-variants := 32bit 64bit
+syscall-list-32bit-options := -D__i386__ -U__x86_64__
+syscall-list-32bit-condition := __WORDSIZE == 32
+syscall-list-64bit-options := -U__i386__ -D__x86_64__
+syscall-list-64bit-condition := __WORDSIZE == 64
 
 ifeq ($(subdir),misc)
 sysdep_routines += ioperm iopl