Rewrite sysd-rules generation using an awk script.

ChangeLog

@@ -1,3 +1,11 @@
+2013-06-17  Roland McGrath  <roland@hack.frob.com>
+
+	* Makerules [inhibit-sysdep-asm] (check-inhibit-asm): Variable removed.
+	($(common-objpfx)sysd-rules): Replace shell logic with running ...
+	* scripts/sysd-rules.awk: ... this new script.
+	* sysdeps/mach/hurd/Makefile (inhibit-sysdep-asm): Use a regexp rather
+	than a glob-style pattern.
+
 2013-06-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* math/test-misc.c (main): Do not treat incorrectly rounded

Makerules

@@ -217,14 +217,9 @@ endif
 # later directory would be chosen over a .c file in an earlier directory,
 # which does not preserve the desired sysdeps ordering behavior.
 
-# System-dependent makefiles can put in `inhibit-sysdep-asm' wildcard
-# patterns matching sysdep directories whose assembly source files should
-# be suppressed.
-ifdef inhibit-sysdep-asm
-define check-inhibit-asm
-case $$sysdir in $(subst $(empty) ,|,$(inhibit-sysdep-asm))) asm= ;; esac;
-endef
-endif
+# System-dependent makefiles can put in `inhibit-sysdep-asm' regexps
+# matching sysdep directories whose assembly source files should be
+# suppressed.
 
 -include $(common-objpfx)sysd-rules
 ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
@@ -233,34 +228,16 @@ ifneq ($(sysd-rules-sysdirs),$(config-sysdirs))
 sysd-rules-force = FORCE
 FORCE:
 endif
-$(common-objpfx)sysd-rules: $(common-objpfx)config.make $(..)Makerules \
+$(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \
+			    $(common-objpfx)config.make $(..)Makerules \
 			    $(sysdep-makefiles) $(sysdep-makeconfigs) \
 			    $(sysd-rules-force)
 	-@rm -f $@T
-	(echo 'sysd-rules-sysdirs := $(config-sysdirs)';		      \
-	 for dir in $(config-sysdirs); do				      \
-	   case "$$dir" in						      \
-	   /*) ;;							      \
-	   *) dir="\$$(..)$$dir" ;;					      \
-	   esac;							      \
-	   asm='.S';							      \
-	   $(check-inhibit-asm)						      \
-	   for o in $(all-object-suffixes); do				      \
-	     set $(subst :, ,$(sysd-rules-patterns));			      \
-	     while [ $$# -ge 2 ]; do					      \
-	       t=$$1; shift; 						      \
-	       d=$$1; shift;						      \
-	       v=$${t%%%}; [ x"$$v" = x ] || v="\$$($${v}CPPFLAGS)";	      \
-	       for s in $$asm .c; do					      \
-		 echo "\$$(objpfx)$$t$$o: $$dir/$$d$$s \$$(before-compile)";  \
-		 echo "	\$$(compile-command$$s) $$v";			      \
-	       done;							      \
-	     done;							      \
-	   done;							      \
-	   echo "\$$(inst_includedir)/%.h: $$dir/%.h \$$(+force)";	      \
-	   echo "	\$$(do-install)"; 				      \
-	 done;								      \
-	 echo 'sysd-rules-done = t') > $@T
+	LC_ALL=C $(AWK) -f $< > $@T \
+			-v all_object_suffixes='$(all-object-suffixes)' \
+			-v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \
+			-v sysd_rules_patterns='$(sysd-rules-patterns)' \
+			-v config_sysdirs='$(config-sysdirs)'
 	mv -f $@T $@
 
 ifndef sysd-rules-done

scripts/sysd-rules.awk

@@ -0,0 +1,60 @@
+# This is a GAWK script to generate the sysd-rules file.
+# It does not read any input, but it requires that several variables
+# be set on its command line (using -v) to their makefile counterparts:
+#	all_object_suffixes	$(all-object-suffixes)
+#	inhibit_sysdep_asm	$(inhibit-sysdep-asm)
+#	config_sysdirs		$(config_sysdirs)
+#	sysd_rules_patterns	$(sysd-rules-patterns)
+
+BEGIN {
+  print "sysd-rules-sysdirs :=", config_sysdirs;
+
+  nsuffixes = split(all_object_suffixes, suffixes);
+  ninhibit_asm = split(inhibit_sysdep_asm, inhibit_asm);
+  nsysdirs = split(config_sysdirs, sysdirs);
+  npatterns = split(sysd_rules_patterns, patterns);
+
+  for (sysdir_idx = 1; sysdir_idx <= nsysdirs; ++sysdir_idx) {
+    dir = sysdirs[sysdir_idx];
+    if (dir !~ /^\//) dir = "$(..)" dir;
+    asm_rules = 1;
+    for (i = 1; i <= ninhibit_asm; ++i) {
+      if (dir ~ ("^.*sysdeps/" inhibit_asm[i] "$")) {
+        asm_rules = 0;
+        break;
+      }
+    }
+    for (suffix_idx = 1; suffix_idx <= nsuffixes; ++suffix_idx) {
+      o = suffixes[suffix_idx];
+      for (pattern_idx = 1; pattern_idx <= npatterns; ++pattern_idx) {
+        pattern = patterns[pattern_idx];
+        if (split(pattern, td, ":") != 2) {
+          print "bad sysd-rules-patterns element '" pattern "'" > "/dev/stderr";
+          exit 2;
+        }
+        target_pattern = td[1];
+        dep_pattern = td[2];
+        if (target_pattern == "%") {
+          command_suffix = "";
+        } else {
+          prefix = gensub(/%/, "", "", target_pattern);
+          command_suffix = " $(" prefix  "CPPFLAGS)";
+        }
+        target = "$(objpfx)" target_pattern o ":";
+        if (asm_rules) {
+          dep = dir "/" dep_pattern ".S";
+          print target, dep, "$(before-compile)";
+          print "\t$(compile-command.S)" command_suffix;
+        }
+        dep = dir "/" dep_pattern ".c";
+        print target, dep, "$(before-compile)";
+        print "\t$(compile-command.c)" command_suffix;
+      }
+    }
+    print "$(inst_includedir)/%.h:", dir "/%.h", "$(+force)";
+    print "\t$(do-install)";
+  }
+
+  print "sysd-rules-done := t";
+  exit 0;
+}

sysdeps/mach/hurd/Makefile

@@ -28,7 +28,7 @@ includes += -I$(..)hurd -I$(common-objpfx)hurd/
 # Do not use any assembly code from sysdeps/unix (and subdirectories).
 # This bypasses all the system call stubs and uses any existing posix or
 # generic C files instead.
-inhibit-sysdep-asm += unix*
+inhibit-sysdep-asm += unix.*
 inhibit-unix-syscalls = yes
 
 # Don't try to generate anything from the installed Unix system and its