nixpkgs/pkgs/build-support/setup-hooks
Orivej Desh fd97db43bc
pruneLibtoolFiles: init setup hook (#41819)
A .la file specifies linker flags to link with the library it describes. Its
"dependency_libs" field lists the libraries that this library depends upon.
This list often contains "-l" flags without corresponding "-L" flags. Many
packages in Nixpkgs deal with this in one of these ways:
- delete .la file [1]
- clear dependency_libs [2]
- add -L flags to dependency_libs [3]
- propagate dependencies [4]

Sometimes "dependency_libs" contain wrong "-L" flags pointing to the "dev"
output with headers rather than to the main output with libraries. They have to
be edited or deleted to reduce closure size [5].

Deleting .la files is often but not always safe [6].  Atomatically deleting as
many of them as possible is complex [7].  Deleting .la files that describe
shared rather than static libraries is probably safe; but clearing their
"dependency_libs" field achieves the same effect with less potential for
unintended consequences.  This is the approach that may be enabled for all
Nixpkgs.

[1] 2a79d296d3
[2] c83a530985
[3] 9e0dcf3bd9
[4] 01134e698f
[5] f6c73f1e37
[6] https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Handling_Libtool_Archives
[7] https://github.com/gentoo/gentoo/blob/fb1f2435/eclass/ltprune.eclass
2018-06-11 18:11:02 +00:00
..
audit-tmpdir.sh
auto-patchelf.sh
autoreconf.sh
compress-man-pages.sh
die.sh
enable-coverage-instrumentation.sh
find-xml-catalogs.sh
fix-darwin-dylib-names.sh
gog-unpack.sh
keep-build-tree.sh
ld-is-cc-hook.sh
make-coverage-analysis-report.sh
make-wrapper.sh
move-docs.sh
move-lib64.sh
move-sbin.sh
multiple-outputs.sh
patch-shebangs.sh
prune-libtool-files.sh pruneLibtoolFiles: init setup hook (#41819) 2018-06-11 18:11:02 +00:00
role.bash
separate-debug-info.sh
set-java-classpath.sh
set-source-date-epoch-to-latest.sh
setup-debug-info-dirs.sh
strip.sh
update-autotools-gnu-config-scripts.sh
use-old-cxx-abi.sh
win-dll-link.sh
wrap-gapps-hook.sh