WL#4380

Modified the abi_check target to check for only
mysql.h and plugin.h for now.

Makefile.am:
  added two targets, 
  
  abi_check -     compiles without mysql_priv.h
  abi_check_all - compiles with mysql_priv.h

Makefile.am

@@ -232,17 +232,22 @@ test-full-qa:
 	        test-fast-cursor test-unit
 
 #
-# Headers which need to be checked for abi/api compatibility
+# Headers which need to be checked for abi/api compatibility.
+# API_PREPROCESSOR_HEADER will be used until mysql_priv.h stablizes
+# after which TEST_PREPROCESSOR_HEADER will be used.
 #
 
-PREPROCESSOR_C_HEADER=$(top_srcdir)/include/mysql/plugin.h \
+API_PREPROCESSOR_HEADER = $(top_srcdir)/include/mysql/plugin.h \
+                           $(top_srcdir)/include/mysql.h
+
+TEST_PREPROCESSOR_HEADER = $(top_srcdir)/include/mysql/plugin.h \
                             $(top_srcdir)/sql/mysql_priv.h \
                             $(top_srcdir)/include/mysql.h
 
 #
-# Rule for checking that the abi/api has not changed.
+# Rules for checking that the abi/api has not changed.
 #
-# The following steps are followed in the rule below
+# The following steps are followed in the do_abi_check rule below
 #
 # 1) Generate preprocessor output for the files that need to
 #    be tested for abi/api changes. use -nostdinc to prevent
@@ -273,9 +278,15 @@ PREPROCESSOR_C_HEADER=$(top_srcdir)/include/mysql/plugin.h \
 # to replace the old canons with the new ones.
 #
 
-abi_check:	$(PREPROCESSOR_C_HEADER)
+abi_check:	$(API_PREPROCESSOR_HEADER)
+	$(MAKE) abi_headers="$^" do_abi_check
+
+abi_check_all:	$(TEST_PREPROCESSOR_HEADER)
+	$(MAKE) abi_headers="$^" do_abi_check
+
+do_abi_check:
 	set -ex; \
-	 for file in $(PREPROCESSOR_C_HEADER); do \
+	for file in $(abi_headers); do \
 	         @CC@ -E -nostdinc -dI \
 	                  -I$(top_srcdir)/include \
 	                  -I$(top_srcdir)/include/mysql \
@@ -286,7 +297,6 @@ abi_check:	$(PREPROCESSOR_C_HEADER)
 	                  @DIFF@ $$file.pp $$file.out; \
 	                  @RM@ $$file.out; \
 	done
-	 touch $@
 
 # Don't update the files from bitkeeper
 %::SCCS/s.%