against the right dynamic libraries. set-env.sh add the right linker flags to the
NIX_LDFLAGS environment variable, which is passed by gcc-wrapper to the linker.
(In many cases these flags could just be passed through LDFLAGS to configure
scripts; however, in many other cases this doesn't work properly.)
--This line, and those below, will be ignored--
M pkgs/atk/atk-build.sh
M pkgs/glibc/glibc-build.sh
M pkgs/expat/expat-build.sh
M pkgs/freetype/freetype-build.sh
M pkgs/system/populate-linkdirs.pl
M pkgs/sdf2/sdf2-build.sh
M pkgs/pspell/pspell-build.sh
M pkgs/subversion/subversion-build.sh
M pkgs/helpers/set-env.sh
M pkgs/pango/pango-build.sh
M pkgs/strategoxt/strategoxt-build.sh
M pkgs/aterm/aterm-build.sh
M pkgs/libxml2/libxml2-build.sh
M pkgs/glib-1/glib-build.sh
M pkgs/glib/glib-build.sh
M pkgs/pan/pan.fix
M pkgs/pan/pan-build.sh
M pkgs/libxslt/libxslt-build.sh
M pkgs/httpd/httpd-build.sh
M pkgs/openssl/openssl-build.sh
M pkgs/gtkspell/gtkspell-build.sh
M pkgs/fontconfig/fontconfig.fix
M pkgs/fontconfig/fontconfig-build.sh
M pkgs/gnet/gnet-build.sh
M pkgs/gtk+-1/gtk+-build.sh
M pkgs/gtk+/gtk+-build.sh
M pkgs/stdenv/gcc-wrapper.sh
M pkgs/stdenv/stdenv-build.sh
M pkgs/db4/db4-build.sh
M pkgs/db4/db4.fix
M pkgs/MPlayer/MPlayer-build.sh
M pkgs/swig/swig-build.sh
svn path=/nixpkgs/trunk/; revision=213
the build and execution environment.
This is very useful. For example, it allows packages built on a SuSE
8.2 system to run on a SuSE 8.1 system (this is because 8.2 has a newer
glibc; packages built against it cannot be dynamically linked against
older glibcs).
Of course, Fix packages should not directly import glibc since that is
very system-specific. Rather, they should import stdenv/stdenv.fix and
in their build scripts source in $stdenv/setup, which will setup the
right environment variables. The idea is that stdenv.fix provides the
basic C/Unix build environment (C compiler, POSIX utilities, etc.).
Note that only the ATerm package currently uses this.
svn path=/nixpkgs/trunk/; revision=203
* A solution to the library abstraction problem (i.e., if
package X needs library Y, and library Y needs library Z,
then we do not (generally) want to declare Z as a input to X
since that would break abstraction). This was not possible
under the old Nix.
svn path=/nixpkgs/trunk/; revision=150
