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%set_build_flags: define LT_SYS_LIBRARY_PATH

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This config is to let libtool recognize that our 64bit variant of
%_libdir is actually on the standard/default library path, so libtool
doesn't think it has to be hard-wired as RPATH.  This is proper solution
for libtool RPATH issues described in:

  https://docs.fedoraproject.org/en-US/packaging-guidelines/#_removing_rpath

The libtool script/macros (new enough, v2.4.6+) honor this variable when
it isn't possible to detect the system-wide default library path.  It is
e.g. able to parse /etc/ld.so.* configuration, but there's no info about
/usr/lib64 on Fedora.

So to not force everybody to do:

   %configure LT_SYS_LIBRARY_PATH=...

... rather set this system-wide.  This is low-risk change since
older libtool scripts don't use this variable, and really no other
tools should.
This commit is contained in:
Pavel Raiskup 2019-03-28 13:37:17 +01:00
parent f5f6818d6e
commit e345575f97
2 changed files with 9 additions and 4 deletions
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9
buildflags.md
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@ -15,9 +15,9 @@ This will invoke the `./configure` with arguments (such as
`--prefix=/usr`) to adjust the paths to the packaging defaults.
As a side effect, this will set the environment variables `CFLAGS`,
`CXXFLAGS`, `FFLAGS`, `FCFLAGS`, and `LDFLAGS`, so they can be used by
makefiles and other build tools. (However, existing values for this
variables are not overwritten.)
`CXXFLAGS`, `FFLAGS`, `FCFLAGS`, `LDFLAGS` and `LT_SYS_LIBRARY_PATH`,
so they can be used by makefiles and other build tools. (However,
existing values for these variables are not overwritten.)
If your package does not use autoconf, you can still set the same
environment variables using
@ -43,6 +43,9 @@ Individual build flags are also available through RPM macros:
driver. At the start of the `%build` section, the environment
variable `RPM_LD_FLAGS` is set to this value.
The variable `LT_SYS_LIBRARY_PATH` is defined here to prevent the `libtool`
script (v2.4.6+) from hardcoding %_libdir into the binaries' RPATH.
These RPM macros do not alter shell environment variables.
For some other build tools separate mechanisms exist:

4
macros
View File

@ -52,12 +52,14 @@
# variables CFLAGS, CXXFLAGS, FFLAGS, FCFLAGS, LDFLAGS if they have
# not been set already. RPM_OPT_FLAGS and RPM_LD_FLAGS have already
# been set implicitly at the start of the %%build section.
# LT_SYS_LIBRARY_PATH is used by libtool script.
%set_build_flags \
CFLAGS="${CFLAGS:-%{build_cflags}}" ; export CFLAGS ; \
CXXFLAGS="${CXXFLAGS:-%{build_cxxflags}}" ; export CXXFLAGS ; \
FFLAGS="${FFLAGS:-%{build_fflags}}" ; export FFLAGS ; \
FCFLAGS="${FCFLAGS:-%{build_fflags}}" ; export FCFLAGS ; \
LDFLAGS="${LDFLAGS:-%{build_ldflags}}" ; export LDFLAGS
LDFLAGS="${LDFLAGS:-%{build_ldflags}}" ; export LDFLAGS ; \
LT_SYS_LIBRARY_PATH="${LT_SYS_LIBRARY_PATH:-%_libdir:}" ; export LT_SYS_LIBRARY_PATH
# Internal-only. Do not use. Expand a variable and strip the flags
# not suitable to extension builders.