C: Difference between revisions

Line 145:

[nix-shell:~] echo $PKG_CONFIG_PATH

[nix-shell:~] $ echo $PKG_CONFIG_PATH

/nix/store/ypg1r7c8m0rkim7by4ikn68xc88bi53j-cryptsetup-2.0.6-dev/lib/pkgconfig:/nix/store/ypg1r7c8m0rkim7by4ikn68xc88bi53j-cryptsetup-2.0.6-dev/lib/pkgconfig

[nix-shell:~] pkg-config --cflags libcryptsetup

[nix-shell:~] $ pkg-config --cflags libcryptsetup

-I/nix/store/ypg1r7c8m0rkim7by4ikn68xc88bi53j-cryptsetup-2.0.6-dev/include

</syntaxHighlight>

== cmake ==

Similar to `pkg-config` `cmake` relies on the <code>$CMAKE_PREFIX_PATH</code> to finds its modules (files ending in <code>.cmake</code>). Also see this example:

with import <nixpkgs> {};

stdenv.mkDerivation {

name = "env";

nativeBuildInputs = [ cmake ];

buildInputs = [ zeromq ];

}

</syntaxHighlight>

$ nix-shell

[nix-shell:~] $ echo $CMAKE_PREFIX_PATH'

/nix/store/lw4xr0x2p6xyfgbk961lxh8vnnx7vn2r-cmake-3.12.1:/nix/store/j4x44bjjgwy7hm7lazj8xnr9mnlfiksh-patchelf-0.9:/nix/store/isg8rxaxkijl9x3hr2gzsf8pqfnqxg3k-gcc-wrapper-7.4.0:/nix/store/lwdkm354f3zzsvkf7pqmnc8w6r164b42-binutils-wrapper-2.30:/nix/store/biz7v9g4g6yrnp2h8wfn01d6pk3bj2m1-zeromq-4.3.0:/nix/store/lw4xr0x2p6xyfgbk961lxh8vnnx7vn2r-cmake-3.12.1:/nix/store/j4x44bjjgwy7hm7lazj8xnr9mnlfiksh-patchelf-0.9:/nix/store/isg8rxaxkijl9x3hr2gzsf8pqfnqxg3k-gcc-wrapper-7.4.0:/nix/store/lwdkm354f3zzsvkf7pqmnc8w6r164b42-binutils-wrapper-2.30:/nix/store/biz7v9g4g6yrnp2h8wfn01d6pk3bj2m1-zeromq-4.3.0

[nix-shell:~] cat >CMakeLists.txt <<EOF

cmake_minimum_required(VERSION 2.8)

project(helloworld)

add_executable(helloworld hello.c)

find_package (ZeroMQ)

EOF

[nix-shell:~] $ echo 'int main {}' > hello.c

[nix-shell:~] $ cmake .

</syntaxHighlight>