build script: do not build c++ pcre libraries

.gitignore

@@ -21,9 +21,7 @@
 /deps/openal/lib/cmake/
 /deps/opusfile/lib/libopusurl.a
 /deps/pcre/bin/
-/deps/pcre/include/pcre_*.h
-/deps/pcre/include/pcrecpp*.h
-/deps/pcre/lib/libpcrecpp.a
+/deps/pcre/lib/pkgconfig/libpcreposix.pc
 /deps/pcre/lib/libpcreposix.a
 /deps/sndfile/bin/
 /deps/sndfile/include/sndfile.hh

build.py

@@ -850,7 +850,10 @@ class OpusFileTarget(ConfigureMakeStaticDependencyTarget):
 class PcreTarget(ConfigureMakeStaticDependencyTarget):
     def __init__(self, name='pcre'):
         super().__init__(name)
-        self.options['--enable-unicode-properties'] = 'yes'
+
+        opts = self.options
+        opts['--enable-unicode-properties'] = 'yes'
+        opts['--enable-cpp'] = 'no'
 
     def prepare_source(self, builder: 'Builder'):
         builder.download_source(