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b14e89e322
A lot of _SRC, _INC, _LIB etc variables are set and expected to be
initialized to an empty string by default. However, an in-depth
review of all of them showed that WOLFSSL_{INC,LIB}, SSL_{INC,LIB},
LUA_{INC,LIB}, and maybe others were not always initialized and could
sometimes leak from the environment and as such cause strange build
issues when running from cascaded scripts that had exported them.
The approach taken here consists in iterating over all USE_* options
and unsetting any _SRC, _INC, _LIB, _CFLAGS and _LDFLAGS that follows
the same name. For the few variable names options that don't exactly
match the build option (SSL & WOLFSSL), these ones are specifically
added to the list. The few that were explicitly cleared in their own
sections were just removed since not needed anymore. Note that an
"undefine" command appeared in GNU make 3.82 but since we support
older ones we can only initialize the variables to an empty string
here. It's not a problem in practice.
We're now certain that these variables are empty wherever they are
used, and that it is possible to just append to them, or use them
as-is.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)