solaris: Remove unnecessary gcc / gnu ld vs sun studio differences

Unfortunately one with_gnu_ld reference remains, otherwise we could remove the
configure support for determining with_gnu_ld.

Reviewed-By: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/20220807012914.ydz73yte6j3coulo@awork3.anarazel.de

src/Makefile.shlib

@@ -188,17 +188,9 @@ ifeq ($(PORTNAME), linux)
 endif
 
 ifeq ($(PORTNAME), solaris)
-  ifeq ($(GCC), yes)
-    LINK.shared		= $(COMPILER) -shared -Wl,-Bsymbolic
-  else
-    LINK.shared		= $(COMPILER) -G -Bsymbolic
-  endif
+  LINK.shared		= $(COMPILER) -shared -Wl,-Bsymbolic
   ifdef soname
-    ifeq ($(with_gnu_ld), yes)
-      LINK.shared	+= -Wl,-soname,$(soname)
-    else
-      LINK.shared	+= -h $(soname)
-    endif
+    LINK.shared	+= -Wl,-soname,$(soname)
   endif
 endif
 

src/makefiles/Makefile.solaris

@@ -1,21 +1,14 @@
 # src/makefiles/Makefile.solaris
 
 AROPT = crs
+rpath = -Wl,-rpath,'$(rpathdir)'
 
 ifeq ($(with_gnu_ld), yes)
 export_dynamic = -Wl,-E
-rpath = -Wl,-rpath,'$(rpathdir)'
-else
-rpath = -Wl,-R'$(rpathdir)'
 endif
 
-
 # Rule for building a shared library from a single .o file
 %.so: %.o
-ifeq ($(GCC), yes)
 	$(CC) $(CFLAGS) $< $(LDFLAGS) $(LDFLAGS_SL) -shared -o $@
-else
-	$(CC) $(CFLAGS) $< $(LDFLAGS) $(LDFLAGS_SL) -G -o $@
-endif
 
 sqlmansect = 5sql