[exim-dev] [Bug 139] Dynamically loadable lookup modules

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Autor: Phil Pennock
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A: exim-dev
Assumpte: [exim-dev] [Bug 139] Dynamically loadable lookup modules
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http://bugs.exim.org/show_bug.cgi?id=139




--- Comment #38 from Phil Pennock <pdp@???> 2011-01-14 04:57:28 ---
Comments sought upon two commits in http://git.exim.org/users/pdp/exim.git :
Avoid the GNU-specific "export" make(1) directive.
Build with BSD Make once more.

http://git.exim.org/users/pdp/exim.git/commit/5065f9e716d9e2441099ca431a6ffe7436812539
http://git.exim.org/users/pdp/exim.git/commit/52f3d00bdede5990dab7d44165d18683a08c1bab

Together, they restructure things so that the build-*/src/lookups/Makefile is
generated using the existing version and a new script, which inserts build
rules. This avoids portability issues of GNU ifdef vs BSD .ifdef in make(1)
rules.

Downside is that new modules also need a one word addition to the shell script
to be eligible for building.

I've defined the new variable CFLAGS_DYNAMIC which is exported down, which
should contain the flags for building .so code on your platform. FreeBSD/amd64
requires -fPIC in addition to the hardcoded assumed flags that were previously
present.

These patches just leave the definition of this variable up to EDITME, but it's
an obvious candidate for going into the OS/Makefile-* fragments. I'm tempted
to then adjust the buildconfig (or the new script) so that if a lookup is
defined as 2 but CFLAGS_DYNAMIC is unset then error out.

Thoughts?


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