Fix xcb thread panic by allowing x11/xcb symbols

Author: zanieb

cpython-unix/build-cpython.sh

@@ -288,7 +288,7 @@ CFLAGS=${CFLAGS//-fvisibility=hidden/}
 # But some symbols from some dependency libraries are still non-hidden for some
 # reason. We force the linker to do our bidding.
 if [ "${PYBUILD_PLATFORM}" != "macos" ]; then
-    LDFLAGS="${LDFLAGS} -Wl,--exclude-libs,ALL"
+    LDFLAGS="${LDFLAGS} -Wl,--exclude-libs,libbz2.so:libcrypto.so:libdb.so:libedit.so:libexpat.so:libffi.so:libformw.so:liblzma.so:libmenuw.so:libmpdec.so:libncursesw.so:libpanelw.so:libsqlite3.so:libssl.so:libtcl8.6.so:libtk8.6.so:libuuid.so:libX11.so:libXau.so:libz.so"
 fi
 
 EXTRA_CONFIGURE_FLAGS=

cpython-unix/build-libX11.sh

@@ -78,6 +78,8 @@ if [ -n "${CROSS_COMPILING}" ]; then
   esac
 fi
 
+EXTRA_TARGET_CFLAGS="${EXTRA_TARGET_CFLAGS//-fvisibility=hidden/}"
+
 # CC_FOR_BUILD is here because configure doesn't look for `clang` when
 # cross-compiling. So we force it.
 CFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC -I/tools/deps/include" \

cpython-unix/build-libxcb.sh

@@ -17,6 +17,8 @@ if [ "${CC}" = "musl-clang" ]; then
     EXTRA_FLAGS="--disable-shared"
 fi
 
+EXTRA_TARGET_CFLAGS="${EXTRA_TARGET_CFLAGS//-fvisibility=hidden/}"
+
 CFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC"  CPPFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC" LDFLAGS="${EXTRA_TARGET_LDFLAGS}" ./configure \
     --build=${BUILD_TRIPLE} \
     --host=${TARGET_TRIPLE} \