Premake test fails on macOS

[tempura-sukiyaki]

What seems to be the problem?

When I pull the latest master branch on macOS, build it, and run Premake Test, I get the following error.

[==========] 2034 tests from 184 test suites ran. (3031 ms total)
[  PASSED  ] 2033 tests.
[  FAILED  ] 1 tests, listed below:
[  FAILED  ] base_os.findlib_FindSystemLib
/********/premake-core/tests/base/test_os.lua:31: expected true but was false

 1 FAILED TEST

What did you expect to happen?

I think all the tests should pass successfully.

What have you tried so far?

I haven't tried anything.
I looked at the source code, but I couldn't understand it.

How can we reproduce this?

Try running Premake Test on macOS.

What version of Premake are you using?

I'm using premake5 (Premake Build Script Generator) 5.0.0-dev.
I pulled the latest master branch of premake-core and built it.

[samsinsane]

What version of macOS is this? Also, is this on an Intel or M1 mac?

[tempura-sukiyaki]

Sorry.
I should have written down the execution environment.

• macOS Big Sur 11.3.1
• Mac mini (2018) / 3.2GHz 6-core Intel Core i7
• Xcode Command Line Tools Version 12.5 (12E262)

[starkos]

I can reproduce this here, also on Big Sur. I think we're missing a search path in get_library_search_path() (os.lua). We link readline when building Premake5 so it must exist, but this test still fails for me:

function suite.findlib_FindSystemLib()
    if os.istarget("windows") then
        test.istrue(os.findlib("user32"))
    elseif os.istarget("haiku") then
        test.istrue(os.findlib("root"))
    elseif os.istarget("darwin") then -- added this clause
        test.istrue(os.findlib("readline"))
    else
        test.istrue(os.findlib("m"))
    end
end

[samsinsane]

From Big Sur release notes https://developer.apple.com/documentation/macos-release-notes/macos-big-sur-11_0_1-release-notes:

New in macOS Big Sur 11.0.1, the system ships with a built-in dynamic linker cache of all system-provided libraries. As part of this change, copies of dynamic libraries are no longer present on the filesystem. Code that attempts to check for dynamic library presence by looking for a file at a path or enumerating a directory will fail. Instead, check for library presence by attempting to dlopen() the path, which will correctly check for the library in the cache. (62986286)