2014-11-19 Siddhesh Poyarekar <siddhesh@redhat.com>
+ * Makeconfig (built-modules): List non-library modules to be
+ built.
+ (module-cppflags): Include libc-modules.h for
+ everything except shlib-versions.v.i.
+ (CPPFLAGS): Use it.
+ (before-compile): Add libc-modules.h.
+ ($(common-objpfx)libc-modules.h,
+ $(common-objpfx)libc-modules.stmp): New targets.
+ (common-generated): Add libc-modules.h and libc-modules.stmp.
+ ($(common-objpfx)Versions.v.i): Depend on libc-modules.h.
+ * include/libc-symbols.h: Don't include libc-modules.h.
+ * include/libc-modules.h: Remove file.
+ * scripts/gen-libc-modules.awk: New script to generate
+ libc-modules.h.
+ * sysdeps/unix/Makefile ($(common-objpfx)sysd-syscalls):
+ Depend on libc-modules.stmp.
+
* include/shlib-compat.h (_SHLIB_COMPAT): Use IS_IN.
* Makeconfig (in-module): Get value of libof set for the
# of many little headers in the include directory.
libio-include = -I$(..)libio
+# List of non-library modules that we build.
+built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
+ libSegFault libpcprofile librpcsvc locale-programs \
+ memusagestat nonlib nscd extramodules libnldbl
+
+# We don't include libc-modules.h when these targets are being built. These
+# targets don't (and will likely never need to) use the IS_IN facility. In
+# fact, shlib-versions should not use it because that will create a circular
+# dependency as libc-modules.h is generated from shlib-versions.
+skip-module-cppflags = shlib-versions.v.i Versions.v.i
+
in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
$(libof-$(<F)) \
$(libof-$(@F)) \
libc))
+module-cppflags-real = -include $(common-objpfx)libc-modules.h \
+ -DIN_MODULE=MODULE_$(in-module)
+
+# We don't need libc-modules.h and the IN_MODULE definition for
+# shlib-version.v.i.
+module-cppflags = $(if $(filter $(@F),$(skip-module-cppflags)), \
+ ,$(module-cppflags-real))
+
# These are the variables that the implicit compilation rules use.
# Note that we can't use -std=* in CPPFLAGS, because it overrides
# the implicit -lang-asm and breaks cpp behavior for .S files--notably
# it causes cpp to stop predefining __ASSEMBLER__.
CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
$($(subdir)-CPPFLAGS) \
- $(+includes) $(defines) \
+ $(+includes) $(defines) $(module-cppflags) \
-include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
- $(CPPFLAGS-$(suffix $@)) -DIN_MODULE=MODULE_$(in-module) \
+ $(CPPFLAGS-$(suffix $@)) \
$(foreach lib,$(libof-$(basename $(@F))) \
$(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
$(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
postclean-generated += soversions.mk soversions.i \
shlib-versions.v shlib-versions.v.i
+before-compile += $(common-objpfx)libc-modules.h
+ifeq ($(soversions.mk-done),t)
+# Generate a header with macro definitions for use with the IS_IN macro.
+# These are the possible values for the IN_MODULE macro defined when building
+# sources, to identify which module the translation unit is going to be built
+# into.
+$(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
+$(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
+ $(common-objpfx)soversions.i
+ $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
+ $(move-if-change) ${@:stmp=T} ${@:stmp=h}
+ touch $@
+
+endif
+
+common-generated += libc-modules.h libc-modules.stmp
+
# The name under which the run-time dynamic linker is installed.
# We are currently going for the convention that `/lib/ld.so.1'
# names the SVR4/ELF ABI-compliant dynamic linker.
+++ /dev/null
-/* Valid values for the IN_MODULE macro, which is defined for each source file
- during compilation to indicate which module it is to be built into.
-
- TODO: This file should eventually be auto-generated. */
-#define MODULE_libc 1
-#define MODULE_libpthread 2
-#define MODULE_rtld 3
-#define MODULE_libdl 4
-#define MODULE_libm 5
-#define MODULE_iconvprogs 6
-#define MODULE_iconvdata 7
-#define MODULE_lddlibc4 8
-#define MODULE_locale_programs 9
-#define MODULE_memusagestat 10
-#define MODULE_libutil 12
-#define MODULE_libBrokenLocale 13
-#define MODULE_libmemusage 15
-#define MODULE_libresolv 16
-#define MODULE_libnss_db 17
-#define MODULE_libnss_files 18
-#define MODULE_libnss_dns 19
-#define MODULE_libnss_compat 20
-#define MODULE_libnss_hesiod 21
-#define MODULE_libnss_nis 22
-#define MODULE_libnss_nisplus 23
-#define MODULE_libanl 24
-#define MODULE_librt 25
-#define MODULE_libSegFault 26
-#define MODULE_libthread_db 27
-#define MODULE_libcidn 28
-#define MODULE_libcrypt 29
-#define MODULE_libnsl 30
-#define MODULE_libpcprofile 31
-#define MODULE_librpcsvc 32
-#define MODULE_nscd 33
-#define MODULE_ldconfig 34
-#define MODULE_libnldbl 35
-
-/* Catch-all for test modules and other binaries. */
-#define MODULE_nonlib 98
-#define MODULE_extramodules 99
#ifndef _LIBC_SYMBOLS_H
#define _LIBC_SYMBOLS_H 1
-/* Pull in definitions for the MODULE_* macros. */
-#include <libc-modules.h>
-
#define IS_IN(lib) (IN_MODULE == MODULE_##lib)
/* This file's macros are included implicitly in the compilation of every
--- /dev/null
+# Generate a header file that defines the MODULE_* macros for each library and
+# module we build in glibc. The library names are pulled in from soversions.i
+# and the additional modules are passed in the BUILDLIST variable.
+BEGIN {
+ # BUILDLIST is set from the build-list variable in Makeconfig and is a space
+ # separated list of non-library modules that we build in glibc.
+ num = split (buildlist, libs, " ")
+ # Separate the built modules from the libraries.
+ libs[++num] = "LIBS_BEGIN"
+}
+
+# Skip over comments.
+$1 == "#" {
+ next
+}
+
+# We have only one special case in soversions.i parsing, which is to replace ld
+# with rtld since that's what we call it throughout the sources.
+match (FILENAME, ".*soversions.i") {
+ name = $2
+ if (name == "ld")
+ name = "rtld"
+
+ # Library names are not duplicated in soversions.i.
+ libs[++num] = name
+}
+
+# Finally, print out the header file.
+END {
+ printf ("/* AUTOGENERATED BY gen-libc-modules.awk, DO NOT EDIT. */\n\n")
+ for (l in libs) {
+ printf ("#define MODULE_%s %d\n", libs[l], l)
+ }
+}
ifndef avoid-generated
$(common-objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \
- $(wildcard $(+sysdep_dirs:%=%/syscalls.list))
+ $(wildcard $(+sysdep_dirs:%=%/syscalls.list)) \
+ $(common-objpfx)libc-modules.stmp
for dir in $(+sysdep_dirs); do \
test -f $$dir/syscalls.list && \
{ sysdirs='$(sysdirs)' \
projects / thirdparty / glibc.git / commitdiff
