I'm using --with-tools-dir on OS X Mavericks to point to an old copy of Xcode 4. I configure jdk9 as follows:
> make dist-clean > hg update -d "<2014-03-17" > sh configure --with-boot-jdk=$JAVA8_HOME > --with-tools-dir=/Applications/Xcode4.app/Contents/Developer/usr/bin Running generated-configure.sh ... Tools summary: * Boot JDK: java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132) Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode) (at /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home) * Toolchain: gcc (GNU Compiler Collection) * C Compiler: Version 4.2.1 (at /Applications/Xcode4.app/Contents/Developer/usr/bin/gcc) * C++ Compiler: Version 4.2.1 (at /Applications/Xcode4.app/Contents/Developer/usr/bin/g++) ... As of March 18, this no longer works. > make dist-clean > hg update -d "<2014-03-18" > sh configure --with-boot-jdk=$JAVA8_HOME > --with-tools-dir=/Applications/Xcode4.app/Contents/Developer/usr/bin Running generated-configure.sh ... Tools summary: * Boot JDK: java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132) Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode) (at /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home) * Toolchain: clang (clang/LLVM) * C Compiler: Version Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) Target: x86_64-apple-darwin13.1.0 Thread model: posix (at /usr/bin/clang) * C++ Compiler: Version Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) Target: x86_64-apple-darwin13.1.0 Thread model: posix (at /usr/bin/clang++) ... I appreciate the effort to get clang to work, but I should still be able to pick my compiler using --with-tools-dir. Should I report a bug? (Note on my motivation: I'm getting build errors due to -Wformat-nonliteral. I've heard this is a known issue, but I'd like to be able to work around it in the mean time.) —Dan
