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89 lines
2.3 KiB
Nix
89 lines
2.3 KiB
Nix
{ lib, stdenv }:
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# This tests that libraries listed in LD_LIBRARY_PATH take precedence over those listed in RPATH.
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let
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# A simple test library: libgreeting.so which exports a single function getGreeting() returning the good old hello greeting.
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libgreeting = stdenv.mkDerivation {
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name = "libgreeting";
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code = ''
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const char* getGreeting() { return "Hello, world!"; }
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'';
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unpackPhase = ''
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echo "$code" > libgreeting.c
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'';
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installPhase = ''
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mkdir -p $out/lib
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$CC -c -fpic libgreeting.c
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$CC -shared libgreeting.o -o $out/lib/libgreeting.so
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'';
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};
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# A variant of libgreeting.so that returns a different message.
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libgoodbye = libgreeting.overrideAttrs (_: {
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name = "libgoodbye";
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code = ''
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const char* getGreeting() { return "Goodbye, world!"; }
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'';
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});
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# A simple consumer of libgreeting.so that just prints the greeting to stdout.
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testProgram = stdenv.mkDerivation {
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name = "greeting-test";
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buildInputs = [ libgreeting ];
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code = ''
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#include <stdio.h>
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extern const char* getGreeting(void);
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int main() {
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puts(getGreeting());
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}
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'';
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unpackPhase = ''
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echo "$code" > greeting-test.c
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'';
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installPhase = ''
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mkdir -p $out/bin
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$CC -c greeting-test.c
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$CC greeting-test.o -lgreeting -o $out/bin/greeting-test
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# Now test the installed binaries right after compiling them. In particular,
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# don't do this in installCheckPhase because fixupPhase has been run by then!
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(
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export PATH=$out/bin
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set -x
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# Verify that our unmodified binary works as expected.
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[ "$(greeting-test)" = "Hello, world!" ]
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# And finally, test that a library in LD_LIBRARY_PATH takes precedence over the linked-in library.
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[ "$(LD_LIBRARY_PATH=${libgoodbye}/lib greeting-test)" = "Goodbye, world!" ]
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)
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'';
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};
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in stdenv.mkDerivation {
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name = "test-LD_LIBRARY_PATH";
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nativeBuildInputs = [ testProgram ];
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buildCommand = ''
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# And for good measure, repeat the tests again from a separate derivation,
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# as fixupPhase done by the stdenv can (and has!) affect the result.
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[ "$(greeting-test)" = "Hello, world!" ]
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[ "$(LD_LIBRARY_PATH=${libgoodbye}/lib greeting-test)" = "Goodbye, world!" ]
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touch $out
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'';
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meta.platforms = lib.platforms.linux;
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}
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