Here's the requested and useful info - full commands and outputs below in case the quick info misses anything. The setup is a bit convoluted sorry, it's a cheap initial attempt at a script to build multiple versions of gcc and llvm. I'm using GIT instead of SVN now, but the issue is the same. QUICK INFO ================ build CWD: "/make/tool/gcc/build/gcc-unk-2020-05-08-06-10-20" build configuration: "/make/tool/gcc/git/gcc-unk-2020-05-08-06-10-20/configure --disable-bootstrap --disable-multilib --enable-languages=c++ --prefix=/make/tool/gcc/use/unk-2020-05-08-06-10-20 --program-suffix=-unk" -v (full output below) has one line showing the issue: "COLLECT_LTO_WRAPPER=/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20 bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper" NOTE: "/make" is the symlink for to "/home/xaxazak/Fast/make" that I don't want expanded output of "g++-unk -E -x c++ - -v < /dev/null" contains many lines using expanded path, eg: " #include <...> search starts here: /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0 " ================ I note that the output from make ends with lines like: "make[4]: Leaving directory '/home/xaxazak/Fast/make/tool/gcc/build/gcc-unk-2020-05-08-06-10-20/x86_64-pc-linux-gnu/libatomic" So perhaps the issue is that the symlinks are being expanded within make? FULL INSTALL & COMMAND DETAILS BELOW SETUP ===== git clone git://gcc.gnu.org/git/gcc.git /make/tool/gcc/git/gcc mv /make/tool/gcc/git/gcc /make/tool/gcc/git/gcc-unk-2020-05-08-06-10-20 mkdir /make/tool/gcc/build/gcc-unk-2020-05-08-06-10-20 ===== BUILD ===== cd /make/tool/gcc/build/gcc-unk-2020-05-08-06-10-20 /make/tool/gcc/git/gcc-unk-2020-05-08-06-10-20/configure --disable-bootstrap --disable-multilib --enable-languages=c++ --prefix=/make/tool/gcc/use/unk-2020-05-08-06-10-20 --program-suffix=-unk make ===== /make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/g++-unk -v ========================================================= Using built-in specs. COLLECT_GCC=/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/g++-unk COLLECT_LTO_WRAPPER=/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /make/tool/base/gcc/git/gcc-unk-2020-05-08-06-10-20/configure --disable-bootstrap --disable-multilib --enable-languages=c++ --prefix=/make/tool/gcc/use/unk-2020-05-08-06-10-20 --program-suffix=-unk Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.0.0 20200507 (experimental) (GCC) ========================================================= /make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/g++-unk -E -x c++ - -v < /dev/null ================================================================================= Using built-in specs. COLLECT_GCC=/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/g++-unk Target: x86_64-pc-linux-gnu Configured with: /make/tool/base/gcc/git/gcc-unk-2020-05-08-06-10-20/configure --disable-bootstrap --disable-multilib --enable-languages=c++ --prefix=/make/tool/gcc/use/unk-2020-05-08-06-10-20 --program-suffix=-unk Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.0.0 20200507 (experimental) (GCC) COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/cc1plus -E -quiet -v -imultiarch x86_64-linux-gnu -iprefix /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/ -D_GNU_SOURCE - -mtune=generic -march=x86-64 ignoring nonexistent directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../x86_64-pc-linux-gnu/include" ignoring duplicate directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0" ignoring duplicate directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0/x86_64-pc-linux-gnu" ignoring duplicate directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0/backward" ignoring duplicate directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/include" ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" ignoring duplicate directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/include-fixed" ignoring nonexistent directory "/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0 /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0/x86_64-pc-linux-gnu /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../include/c++/11.0.0/backward /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/include /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/include-fixed /usr/local/include /home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/../../include /usr/include/x86_64-linux-gnu /usr/include End of search list. # 1 "<stdin>" # 1 "<built-in>" # 1 "<command-line>" # 1 "/usr/include/stdc-predef.h" 1 3 4 # 1 "<command-line>" 2 # 1 "<stdin>" COMPILER_PATH=/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/:/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../libexec/gcc/ LIBRARY_PATH=/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/:/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/:/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib64/:/home/xaxazak/Fast/make/tool/gcc/use/unk-2020-05-08-06-10-20/bin/../lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' =================================================================================