diff options
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 20 |
1 files changed, 19 insertions, 1 deletions
@@ -536,7 +536,7 @@ these flags interact with those variables. VAR=value - Assignment if environment variable for Configure. These + Assignment of environment variable for Configure. These work just like normal environment variable assignments, but are supported on all platforms and are confined to the configuration scripts only. These assignments override @@ -587,6 +587,24 @@ ./config -DFOO CPPFLAGS=-DBAR -DCOOKIE + Backward compatibility note: + + To be compatible with older configuration scripts, the + environment variables are ignored if compiling / linking + flags are given on the command line, except for these: + + AR, CC, CXX, CROSS_COMPILE, HASHBANGPERL, PERL, RANLIB, RC + and WINDRES + + For example, the following command will not see -DBAR: + + CPPFLAGS=-DBAR ./config -DCOOKIE + + However, the following will see both set variables: + + CC=gcc CROSS_COMPILE=x86_64-w64-mingw32- \ + ./config -DCOOKIE + reconf reconfigure Reconfigure from earlier data. This fetches the previous |