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Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 32 |
1 files changed, 32 insertions, 0 deletions
@@ -0,0 +1,32 @@ +Currently, to use build2 you will need a C++ compiler with C++14 support. +This may be relaxed later to only require C++11. For now, gcc 4.9.0 or +later and clang 3.5.0 or later are known to work. + +build2 is self-hosted, which means that unless you have obtained a pre- +built binary of build2 from somewhere else, you will need to bootstrap +it. To accomplish this, use the 'bootstrap' shell script found in the +root directory of the build2 project. The following is a recommended +sequence of steps: + +1. Execute 'bootstrap' specifying the C++ compiler to be used if necessary + (default is 'g++'). For example: + + $ ./bootstrap --cxx clang++-3.5 + + Once the script completes successfully, the build2 binary is saved + as 'build/b-boot'. + +2. Next, build the build2 binary using the bootstrapped binary from step + 1 above, again specifying the C++ compiler if necessary, for example: + + $ build/b-boot config.cxx=clang++-3.5 + + The result of this command is saved as 'build/b'. + +3. Finally, rebuild the build2 binary using the binary built at step 2 + above, and verify that they are identical. For example: + + $ mv build/b build/b-prev + $ build/b-prev config.cxx=clang++-3.5 clean + $ build/b-prev config.cxx=clang++-3.5 configure update + $ diff -b build/b build/b-prev |