hacks to make gcc7.2 compile on Tiger

.gitignore

@@ -2,4 +2,5 @@
 .*.swp
 CMakeLists.txt.user
 .finf
-InterfacesAndLibraries
+InterfacesAndLibraries
+.DS_Store

README.md

@@ -31,10 +31,11 @@ On a Mac, get the homebrew package manager and:
     brew install boost --c++11
     brew install cmake gmp mpfr libmpc bison
 
-In theory, you can also run Retro68 on a PowerMac G4 or G5 running Mac OS 10.4 (Tiger).
+You can also run Retro68 on a PowerMac G4 or G5 running Mac OS 10.4 (Tiger).
 In that case, get the tigerbrew package manager and
 
-    brew install gcc cmake
+    brew install gcc cmake gmp mpfr libmpc bison
+    brew install boost --c++11
 
 ### Apple Universal Interfaces
 
@@ -81,9 +82,10 @@ the build directory. All the commands are in `toolchain/bin`, so you might want
 to add that to your `PATH`.
 
 If you're building this on a PowerMac running Mac OS X 10.4, tell the build script
-to use the gcc you've installed via tigerbrew:
+to use the gcc you've installed via tigerbrew, and set an environment variable to work around
+a problem caused by GCC's build system:
 
-    ../Retro68/build-toolchain.bash --host-cxx-compiler=g++-5 --host-c-compiler=gcc-5
+    gcc_cv_c_no_fpie=no ../Retro68/build-toolchain.bash --host-cxx-compiler=g++-5 --host-c-compiler=gcc-5
 
 ### Build options and recompiling
 

build-toolchain.bash

@@ -67,6 +67,7 @@ for ARG in $*; do
 			;;
 		--host-cxx-compiler=*)
 			HOST_CMAKE_FLAGS[${#HOST_CMAKE_FLAGS[@]}]="-DCMAKE_CXX_COMPILER=${ARG#*=}"
+			HOST_CXX_COMPILER="${ARG#*=}"
 			;;
 		--host-c-compiler=*)
 			HOST_CMAKE_FLAGS[${#HOST_CMAKE_FLAGS[@]}]="-DCMAKE_C_COMPILER=${ARG#*=}"
@@ -260,6 +261,9 @@ if [ $SKIP_THIRDPARTY != true ]; then
 		export CPPFLAGS="-I/usr/local/include"
 		export LDFLAGS="-L/usr/local/lib"
 		
+		export CC=$HOST_C_COMPILER
+		export CXX=$HOST_CXX_COMPILER
+		
 		# Build binutils for 68K
 		mkdir -p binutils-build
 		cd binutils-build
@@ -283,6 +287,8 @@ if [ $SKIP_THIRDPARTY != true ]; then
 
 		unset CPPFLAGS
 		unset LDFLAGS
+		unset CC
+		unset CXX
 
 		# Move the real linker aside and install symlinks to Elf2Mac
 		# (Elf2Mac is built by cmake below)
@@ -306,6 +312,9 @@ if [ $SKIP_THIRDPARTY != true ]; then
 		export CPPFLAGS="-I/usr/local/include"
 		export LDFLAGS="-L/usr/local/lib"
 
+		export CC=$HOST_C_COMPILER
+		export CXX=$HOST_CXX_COMPILER
+		
 		# Build binutils for PPC
 		mkdir -p binutils-build-ppc
 		cd binutils-build-ppc
@@ -327,6 +336,8 @@ if [ $SKIP_THIRDPARTY != true ]; then
 
 		unset CPPFLAGS
 		unset LDFLAGS
+		unset CC
+		unset CXX
 
 		if [ $CLEAN_AFTER_BUILD != false ]; then
 			rm -rf binutils-build-ppc