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1.1.1.3 ! root 1: How to compile X11R5 (patch level 11) with GCC version 2: 1.1 root 2: 3: The patches include support for building the shared libraries with GCC 2 on 1.1.1.3 ! root 4: the Sparc and 68k machines. NOTE: Such shared libraries DO NOT WORK ! 5: with executables previously linked using Sun CC! This is because ! 6: neither those executables nor the gcc-compiled shared libraries contain ! 7: libgcc.a. The shared libraries do work with executables linked using ! 8: GCC (running the Sun linker, of course) because GCC tells the linker to ! 9: link in libgcc.a. Because of these limitations the default behavior is ! 10: to NOT build the shared libraries with gcc. If you want the gcc-compiled ! 11: shared libraries turn on "Gcc2BuildLibs" in site.def ! 12: ! 13: If you want to build a shared library that works with executables ! 14: linked with Sun CC, you will have to arrange to include libgcc.a in ! 15: the shared libraries. The instructions below do not handle this. 1.1 root 16: 1.1.1.2 root 17: Sun forgot to include a static version of libdl.a with some versions 18: of SunOS (4.1 mainly). If you see undefined symbols _dlopen, _dlsym, 19: or _dlclose when linking with -lX11, compile and link against the file 20: mit/util/misc/dlsym.c in the MIT X11R5 distribution. 21: 1.1 root 22: mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2. If 23: -fstrength-reduce (or any other -f option) is a major win, then it will 24: most likely be turned on by -O2 optimization. 25: 1.1.1.3 ! root 26: mit/config/sunLib.rules -- If HasGcc2 and Gcc2BuildLibs are defined, then ! 27: use gcc -fpic to generate PIC code. Make sure that gcc does not use gas (the ! 28: GNU assembler) when compiling PIC code; gas does not assemble it correctly. ! 29: If you have gas installed where gcc uses it by default, you might have to add 1.1.1.2 root 30: -B/bin/ to the PositionIndependentCFlags. 1.1 root 31: 32: mit/config/site.def -- Define HasGcc2 to be YES. 33: 34: mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization. 35: 36: mit/rgb/Imakefile -- No longer need to compile some modules with 37: cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code. 38: 39: mit/server/os/Imakefile -- Likewise. 40: 41: *** mit/config/Imake.tmpl.ORIG Tue Dec 31 11:07:56 1991 42: --- mit/config/Imake.tmpl Tue Dec 31 12:30:47 1991 43: *************** 44: *** 499,508 **** 45: --- 499,512 ---- 46: #define HasGcc NO 47: #endif 48: #ifndef CcCmd 49: + #if HasGcc2 50: + #define CcCmd gcc -fpcc-struct-return 51: + #else 52: #if HasGcc 53: #define CcCmd gcc -fstrength-reduce -fpcc-struct-return 54: #else 55: #define CcCmd cc 56: + #endif 57: #endif 58: #endif 59: #if HasFortran 60: *** mit/config/sunLib.rules.ORIG Tue Dec 31 11:11:24 1991 1.1.1.3 ! root 61: --- mit/config/sunLib.rules Tue May 5 12:26:12 1992 1.1 root 62: *************** 1.1.1.3 ! root 63: *** 23,30 **** ! 64: --- 23,34 ---- 1.1 root 65: #define SharedLibraryLoadFlags -assert pure-text 66: #endif 67: #ifndef PositionIndependentCFlags 1.1.1.3 ! root 68: + #if defined(HasGcc2) && defined (Gcc2BuildLibs) 1.1 root 69: + #define PositionIndependentCFlags -fpic 70: + #else 71: #define PositionIndependentCFlags -pic 72: #endif 1.1.1.3 ! root 73: + #endif 1.1 root 74: 75: /* 1.1.1.3 ! root 76: * InstallSharedLibrary - generate rules to install the shared library. 1.1 root 77: *** mit/config/site.def.ORIG Tue Dec 31 11:13:49 1991 78: --- mit/config/site.def Tue Dec 31 12:02:59 1991 79: *************** 80: *** 25,31 **** 81: 82: #ifdef BeforeVendorCF 83: 84: ! /* #define HasGcc YES */ 85: 86: #endif /* BeforeVendorCF */ 87: 1.1.1.3 ! root 88: --- 25,33 ---- 1.1 root 89: 90: #ifdef BeforeVendorCF 91: 92: ! #define HasGcc YES 93: ! #define HasGcc2 YES 1.1.1.3 ! root 94: ! /* #define Gcc2BuildLibs YES */ 1.1 root 95: 96: #endif /* BeforeVendorCF */ 97: 98: *** mit/config/sun.cf.ORIG Tue Dec 31 11:13:57 1991 1.1.1.3 ! root 99: --- mit/config/sun.cf Tue May 5 12:29:50 1992 1.1 root 100: *************** 101: *** 34,42 **** 1.1.1.3 ! root 102: --- 41,61 ---- 1.1 root 103: 104: #if HasGcc 105: 106: + #if defined(HasGcc2) 1.1.1.3 ! root 107: + #define OptimizedCDebugFlags -O2 ! 108: + /* Leave Alone XXX */ ! 109: + #else ! 110: + #define OptimizedCDebugFlags -O 1.1 root 111: #define SharedLibraryCcCmd cc 112: #define ExtraLoadFlags -B/usr/bin/ 113: #define AllocateLocalDefines /**/ 114: + #endif 1.1.1.3 ! root 115: + ! 116: + #if !defined(Gcc2BuildLibs) ! 117: + #define SharedLibraryCcCmd cc ! 118: + #define ExtraLoadFlags -B/usr/bin/ ! 119: + #define AllocateLocalDefines /**/ ! 120: + #endif 1.1 root 121: 122: .c.o: 123: $(CC) -c $(CFLAGS) $*.c 124: *** mit/rgb/Imakefile.ORIG Wed Jan 15 16:43:18 1992 125: --- mit/rgb/Imakefile Thu Jan 2 13:34:09 1992 126: *************** 127: *** 17,23 **** 128: #if !(defined(SGIArchitecture) || SystemV4) 129: DBMLIB = -ldbm 130: #endif 131: ! #if defined(SparcArchitecture) && HasGcc 132: CC = cc 133: CCOPTIONS = /**/ 134: EXTRA_LOAD_FLAGS = /**/ 135: --- 17,23 ---- 136: #if !(defined(SGIArchitecture) || SystemV4) 137: DBMLIB = -ldbm 138: #endif 139: ! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) 140: CC = cc 141: CCOPTIONS = /**/ 142: EXTRA_LOAD_FLAGS = /**/ 143: *** mit/server/os/Imakefile.ORIG Wed Jan 15 16:46:23 1992 144: --- mit/server/os/Imakefile Wed Jan 15 16:46:48 1992 145: *************** 146: *** 132,138 **** 147: SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) 148: SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) 149: SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) 150: ! #if defined(SparcArchitecture) && HasGcc 151: oscolor.o: $(ICONFIGFILES) 152: $(RM) $@ 153: cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c 154: --- 132,138 ---- 155: SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) 156: SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) 157: SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) 158: ! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) 159: oscolor.o: $(ICONFIGFILES) 160: $(RM) $@ 161: cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
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