Successfully bootstrapped with the GNU userspace

sources/zlib/zlib.spec

@@ -1,14 +1,22 @@
 # Maintainer: Alexander Hill <ahill@breadpudding.dev>
 SRC_HASH="38ef96b8dfe510d42707d9c781877914792541133e1870841463bfa73f883e32"
 SRC_NAME="zlib"
+SRC_REVISION=1
 SRC_URL="https://www.zlib.net/zlib-1.3.1.tar.xz"
 SRC_VERSION="1.3.1"
 
 build() {
     tar xf ../$SRC_FILENAME
-    cd zlib-*/
+    cd zlib-$SRC_VERSION/
     # NOTE: The prefix is set to /usr because man pages are stored under the
     #       prefix whether you like it or not. ~ahill
+    # NOTE: Zlib refuses to build a shared library if it can't pass the test.
+    #       Rather than stopping the build, it simply proceeds to build a static
+    #       library, which causes issues when building libarchive. The test is
+    #       failing due to it relying on undefined symbols that are referenced
+    #       in the linker script, which LLVM doesn't like at all. To tell LLVM
+    #       to ignore it, we pass --undefined-version to the linker. ~ahill
+    CFLAGS="-Wl,--undefined-version $CFLAGS" \
     ./configure \
         --eprefix=$TT_PREFIX \
         --includedir=$TT_INCLUDEDIR \
@@ -18,11 +26,7 @@ build() {
     make -O -j $TT_PROCS
 }
 
-clean() {
-    rm -rf zlib-*/
-}
-
 package() {
-    cd zlib-*/
+    cd zlib-$SRC_VERSION/
     make -O -j $TT_PROCS install DESTDIR=$TT_INSTALLDIR
 }