[HiGHSstatic] remove Zlib dependency (#8409)

Co-authored-by: Ian McInerney <i.mcinerney17@imperial.ac.uk>

H/HiGHS/HiGHSstatic/build_tarballs.jl

@@ -1,6 +1,6 @@
 # To ensure a build, it isn't sufficient to modify highs_common.jl.
 # You also need to update a line in this file:
-#     Last updated: 2024-03-07
+#     Last updated: 2024-04-02, bump 2
 
 include("../highs_common.jl")
 
@@ -19,6 +19,7 @@ dependencies = [
     # is a build-only dependency, in the other cases it's also a runtime one.
     Dependency("CompilerSupportLibraries_jll"; platforms=filter(!Sys.iswindows, platforms)),
     BuildDependency("CompilerSupportLibraries_jll"; platforms=filter(Sys.iswindows, platforms)),
+    HostBuildDependency(PackageSpec(; name="CMake_jll")),
     Dependency("Zlib_jll"),
 ]
 

H/HiGHS/highs_common.jl

@@ -18,9 +18,13 @@ sources = [
 platforms = supported_platforms()
 
 function build_script(; shared_libs::String)
-    return "BUILD_SHARED=$(shared_libs)\n" * raw"""
+    build_static = shared_libs == "OFF" ? "ON" : "OFF"
+    return "BUILD_SHARED=$(shared_libs)\nBUILD_STATIC=$(build_static)\n" * raw"""
 cd $WORKSPACE/srcdir/HiGHS
 
+# Remove system CMake to use the jll version
+apk del cmake
+
 mkdir -p build
 cd build
 
@@ -33,6 +37,7 @@ cmake -DCMAKE_INSTALL_PREFIX=${prefix} \
     -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=${BUILD_SHARED} \
+    -DZLIB_USE_STATIC_LIBS=${BUILD_STATIC} \
     -DFAST_BUILD=ON \
     -DJULIA=ON ..