How to compile X11R5 (patch level 11) with GCC version 2: The patches include support for building the shared libraries with GCC 2 on the Sparc and 68k machines. NOTE: Such shared libraries DO NOT WORK with executables previously linked using Sun CC! This is because neither those executables nor the gcc-compiled shared libraries contain libgcc.a. The shared libraries do work with executables linked using GCC (running the Sun linker, of course) because GCC tells the linker to link in libgcc.a. Because of these limitations the default behavior is to NOT build the shared libraries with gcc. If you want the gcc-compiled shared libraries turn on "Gcc2BuildLibs" in site.def If you want to build a shared library that works with executables linked with Sun CC, you will have to arrange to include libgcc.a in the shared libraries. The instructions below do not handle this. Sun forgot to include a static version of libdl.a with some versions of SunOS (4.1 mainly). If you see undefined symbols _dlopen, _dlsym, or _dlclose when linking with -lX11, compile and link against the file mit/util/misc/dlsym.c in the MIT X11R5 distribution. mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2. If -fstrength-reduce (or any other -f option) is a major win, then it will most likely be turned on by -O2 optimization. mit/config/sunLib.rules -- If HasGcc2 and Gcc2BuildLibs are defined, then use gcc -fpic to generate PIC code. Make sure that gcc does not use gas (the GNU assembler) when compiling PIC code; gas does not assemble it correctly. If you have gas installed where gcc uses it by default, you might have to add -B/bin/ to the PositionIndependentCFlags. mit/config/site.def -- Define HasGcc2 to be YES. mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization. mit/rgb/Imakefile -- No longer need to compile some modules with cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code. mit/server/os/Imakefile -- Likewise. mit/clients/twm/Imakefile -- fix bad decls of malloc, realloc in gram.c. *** mit/config/Imake.tmpl.ORIG Tue Dec 31 11:07:56 1991 --- mit/config/Imake.tmpl Tue Dec 31 12:30:47 1991 *************** *** 499,508 **** --- 499,512 ---- #define HasGcc NO #endif #ifndef CcCmd + #if HasGcc2 + #define CcCmd gcc -fpcc-struct-return + #else #if HasGcc #define CcCmd gcc -fstrength-reduce -fpcc-struct-return #else #define CcCmd cc + #endif #endif #endif #if HasFortran *** mit/config/sunLib.rules.ORIG Tue Dec 31 11:11:24 1991 --- mit/config/sunLib.rules Tue May 5 12:26:12 1992 *************** *** 23,30 **** --- 23,34 ---- #define SharedLibraryLoadFlags -assert pure-text #endif #ifndef PositionIndependentCFlags + #if defined(HasGcc2) && defined (Gcc2BuildLibs) + #define PositionIndependentCFlags -fpic + #else #define PositionIndependentCFlags -pic #endif + #endif /* * InstallSharedLibrary - generate rules to install the shared library. *** mit/config/site.def.ORIG Tue Dec 31 11:13:49 1991 --- mit/config/site.def Tue Dec 31 12:02:59 1991 *************** *** 25,31 **** #ifdef BeforeVendorCF ! /* #define HasGcc YES */ #endif /* BeforeVendorCF */ --- 25,33 ---- #ifdef BeforeVendorCF ! #define HasGcc YES ! #define HasGcc2 YES ! /* #define Gcc2BuildLibs YES */ #endif /* BeforeVendorCF */ *** mit/config/sun.cf.ORIG Tue Dec 31 11:13:57 1991 --- mit/config/sun.cf Tue May 5 12:29:50 1992 *************** *** 34,42 **** --- 41,61 ---- #if HasGcc + #if defined(HasGcc2) + #define OptimizedCDebugFlags -O2 + /* Leave Alone XXX */ + #else + #define OptimizedCDebugFlags -O #define SharedLibraryCcCmd cc #define ExtraLoadFlags -B/usr/bin/ #define AllocateLocalDefines /**/ + #endif + + #if !defined(Gcc2BuildLibs) + #define SharedLibraryCcCmd cc + #define ExtraLoadFlags -B/usr/bin/ + #define AllocateLocalDefines /**/ + #endif .c.o: $(CC) -c $(CFLAGS) $*.c *** mit/rgb/Imakefile.ORIG Wed Jan 15 16:43:18 1992 --- mit/rgb/Imakefile Thu Jan 2 13:34:09 1992 *************** *** 17,23 **** #if !(defined(SGIArchitecture) || SystemV4) DBMLIB = -ldbm #endif ! #if defined(SparcArchitecture) && HasGcc CC = cc CCOPTIONS = /**/ EXTRA_LOAD_FLAGS = /**/ --- 17,23 ---- #if !(defined(SGIArchitecture) || SystemV4) DBMLIB = -ldbm #endif ! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) CC = cc CCOPTIONS = /**/ EXTRA_LOAD_FLAGS = /**/ *** mit/server/os/Imakefile.ORIG Wed Jan 15 16:46:23 1992 --- mit/server/os/Imakefile Wed Jan 15 16:46:48 1992 *************** *** 132,138 **** SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) ! #if defined(SparcArchitecture) && HasGcc oscolor.o: $(ICONFIGFILES) $(RM) $@ cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c --- 132,138 ---- SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) ! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) oscolor.o: $(ICONFIGFILES) $(RM) $@ cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c *** 1.1 1992/09/08 19:52:07 --- mit/server/ddx/sun/Imakefile 1992/09/08 21:10:22 *************** *** 43,48 **** --- 43,53 ---- LinkFile(sunGX.o,sunGX.o.dist) #endif + #if HasGcc2 + SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile) + SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile) + #endif + sunInitExtMono.o: $(ICONFIGFILES) ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT) ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY) *** /tmp/RCSAa24446 Tue Sep 15 12:23:32 1992 --- mit/clients/twm/Imakefile Thu Aug 13 18:18:07 1992 *************** *** 32,41 **** --- 32,48 ---- ComplexProgramTarget(twm) InstallNonExecFile(system.twmrc,$(TWMDIR)) + #if HasGcc2 && defined (SunArchitecture) gram.h gram.c: gram.y yacc $(YFLAGS) gram.y + sed -e 's/^extern char \*malloc(), \*realloc();//g' y.tab.c >gram.c + $(MV) y.tab.h gram.h + #else + gram.h gram.c: gram.y + yacc $(YFLAGS) gram.y $(MV) y.tab.c gram.c $(MV) y.tab.h gram.h + #endif clean:: $(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c