[build-script] Isolate CMake from the system

DougGregor · DougGregor · commit fb42e07a0ac3 · 2020-06-17T09:54:15.000-07:00
When building on Darwin, we're supposed to build against the SDK,
not the host system. Isolate the build further from the system.
diff --git a/utils/build-script b/utils/build-script
@@ -701,6 +701,9 @@ class BuildScriptInvocation(object):
                 "--host-lipo", toolchain.lipo,
             ]
 
+            # Isolate build from the system; Darwin toolchains build against SDKs.
+            args.extra_cmake_options.append('-DCMAKE_IGNORE_PATH=/usr/lib;/usr/local/lib;/lib')
+
         if toolchain.libtool is not None:
             impl_args += [
                 "--host-libtool", toolchain.libtool,

Original file line number	Diff line number	Diff line change
`@@ -701,6 +701,9 @@ class BuildScriptInvocation(object):`
`701`	`701`	`"--host-lipo", toolchain.lipo,`
`702`	`702`	`]`
`703`	`703`
	`704`	`+ # Isolate build from the system; Darwin toolchains build against SDKs.`
	`705`	`+ args.extra_cmake_options.append('-DCMAKE_IGNORE_PATH=/usr/lib;/usr/local/lib;/lib')`
	`706`	`+`
`704`	`707`	`if toolchain.libtool is not None:`
`705`	`708`	`impl_args += [`
`706`	`709`	`"--host-libtool", toolchain.libtool,`