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Diffstat (limited to 'doc/INSTALL')
| -rw-r--r-- | doc/INSTALL | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/INSTALL b/doc/INSTALL index 33bb4bc7..9ed6e131 100644 --- a/doc/INSTALL +++ b/doc/INSTALL @@ -170,6 +170,32 @@ If you figure out how to install on other platforms, contact the Netpbm maintainer to have the 'configure' program or these instructions improved for the next person. +If you want to use a compiler other than your system default, set +the CC value in config.mk to the shell command name for your compiler, +e.g. + + CC=clang-3 + +You can also override it on the Make command line, which is especially +useful if you want to build some parts with one compiler and other parts +with another compiler: + + $ make pamflip CC=clang-3 + +To get appropriate defaults when you run 'configure', you can also set what +compiler Configure assumes you will be using to build, with an environment +variable: + + $ CC=clang-3 ./configure + +Likewise, you can add compiler flags with a CFLAGS make variable, either set +in config.mk or on the make command line and you can get better get more +appropriate defaults from Configure if you pass the same CFLAGS to Configure +via environment variable. LDFLAGS (linker options) and CPPFLAGS (C +preprocessor options) are similar. + + $ make CFLAGS=-O0 + CUSTOM INSTALLATION ------------------- |