Self-contained Xcode, missing libs and headers

[kylef]

With a clean install with just Homebrew and Xcode, homebrew failed to build many packages. Since the /usr/lib and /usr/include folder is missing. The following has solved these issues:

sudo ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include /usr/include

There are not many libraries in /usr/lib. And /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/lib contains most

Perhaps we can detect the current OS X version and find the appropriate SDK in Xcode app bundle if these paths are missing. I didn't have much luck with setting these paths via the appropriate compiler flags.

[jacknagel]

MacOSX10.8.sdk

Is this Mountain Lion?

[kylef]

Yes, but I think the same applies to 10.7 right?

[jacknagel]

I'm fairly certain that /usr/lib and /usr/include exist on Lion.

[MikeMcQuaid]

@jacknagel @mxcl I experienced this too. Couldn't get QMake or CMake to play nice without the command-line tools. I think that's our new dependency rather than Xcode.

[mxcl]

I can confirm /usr/include does not exist on a fresh Lion install. But obviously /usr/lib does.

[mxcl]

But I also confirm that if you only install Xcode 4.3, you can barely build anything, a tonne of shit is missing.

[MikeMcQuaid]

We should probably not demand it but brew doctor should whine very loudly if it is missing.

[mxcl]

For reference this is generally the configure error in question:

configure:4370: checking whether the C compiler works
configure:4392: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -Os -w -pipe -march=native   conftest.c  >&5
ld: library not found for -lcrt1.10.6.o

[mxcl]

K, I know how to fix up brew doctor so that we tell the user what to do.

[mxcl]

In fact I guess we could get around the restriction that you must install the CLI tools. All the libs we need are in Xcode.app/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.x/usr/lib and associated folders.

We can pass an -isystem to CFLAGS and it should all just work (TM).

However consider Xcode users are now probably the minority. I don't think it matters. Even though I'm that minority.

[MikeMcQuaid]

If we can get it working, cool.

[mxcl]

BTW whole new category of bugs ready to happen: people who don't update the CLI tools because there is no auto-update for it.

[kylef]

There is an update automatically checkbox for the download inside Xcode.

There is no autoconf/automake with the command line tools nor Xcode (4.4) I installed.

[Crazor]

So does homebrew now need CLT? Even though -isystem gets passed to the compiler, it complains about missing stuff like unistd.h when CLT are not installed.

[mxcl]

Patches to make Homebrew not require CLT if Xcode 4.3 is installed are welcome. I think it's possible, you need an additional -isystem and LDFLAGS and all sorts.

We'd need to test the patch thoroughly before applying. Who knows what weirdness may occur.

For now CLT is required.

[adamv]

(Required if 4.3 is installed; not on Snow Leopard for instance of course.)

[adamv]

Can close this now?