Build system: Get rid of the unused EXTRALIBS variable

Makefile.config.in

@@ -204,7 +204,6 @@ NATIVECCLIBS=@nativecclibs@
 SYSTHREAD_SUPPORT=@systhread_support@
 PACKLD=@PACKLD@
 FLEXDLL_CHAIN=@flexdll_chain@
-EXTRALIBS=@extralibs@
 CCOMPTYPE=@ccomptype@
 TOOLCHAIN=@toolchain@
 CMXS=@cmxs@

configure.ac

@@ -54,7 +54,6 @@ SO="so"
 toolchain="cc"
 profinfo=false
 profinfo_width=0
-extralibs=
 instrumented_runtime=true
 force_instrumented_runtime=false
 instrumented_runtime_libs=""
@@ -102,7 +101,6 @@ AC_SUBST([unix_or_win32])
 AC_SUBST([outputexe])
 AC_SUBST([outputobj])
 AC_SUBST([syslib])
-AC_SUBST([extralibs])
 AC_SUBST([fpic])
 AC_SUBST([mkexe])
 AC_SUBST([mkexedebugflag])

runtime/Makefile

@@ -168,10 +168,6 @@ OC_INSTR_CPPFLAGS=-DCAML_INSTR
 
 LIBS := $(BYTECCLIBS)
 
-ifeq "$(UNIX_OR_WIN32)" "win32"
-LIBS += $(EXTRALIBS)
-endif
-
 # Build, install and clean targets
 
 .PHONY: all

stdlib/Makefile

@@ -157,7 +157,7 @@ camlhead%: tmphead%.exe
 # Again, pattern weirdness here means that the dot is always present so that
 # tmpheader.exe matches.
 tmpheader%exe: $(HEADERPROGRAM)%$(O)
-	$(call MKEXE_USING_COMPILER,$@,$^ $(EXTRALIBS))
+	$(call MKEXE_USING_COMPILER,$@,$^)
 # FIXME This is wrong - mingw could invoke strip; MSVC equivalent?
 ifneq "$(UNIX_OR_WIN32)" "win32"
 	strip $@
@@ -175,7 +175,7 @@ camlheader_ur: camlheader
 
 ifeq "$(UNIX_OR_WIN32)" "unix"
 tmptargetcamlheader%exe: $(TARGETHEADERPROGRAM)%$(O)
-	$(call MKEXE_USING_COMPILER,$@,$^ $(EXTRALIBS))
+	$(call MKEXE_USING_COMPILER,$@,$^)
 	strip $@
 
 $(TARGETHEADERPROGRAM)%$(O): $(HEADERPROGRAM).c

yacc/Makefile

@@ -36,7 +36,7 @@ generated_files := ocamlyacc$(EXE) $(ocamlyacc_OBJECTS)
 all: ocamlyacc$(EXE)
 
 ocamlyacc$(EXE): $(ocamlyacc_OBJECTS)
-	$(MKEXE) -o $@ $^ $(EXTRALIBS)
+	$(MKEXE) -o $@ $^
 
 .PHONY: clean
 clean: