guix: Build dmg as a static binary

This relatively easy change eliminates all runtime dependencies (except
for the kernel) for dmg, which is the only native build tool that gets
put in our output tarballs.

This allows much more flexibility when constructing the codesigning
environment, and is much more robust.

Author: dongcarl

contrib/guix/libexec/build.sh

@@ -54,6 +54,7 @@ store_path() {
 # Set environment variables to point the NATIVE toolchain to the right
 # includes/libs
 NATIVE_GCC="$(store_path gcc-toolchain)"
+NATIVE_GCC_STATIC="$(store_path gcc-toolchain static)"
 
 unset LIBRARY_PATH
 unset CPATH
@@ -62,7 +63,7 @@ unset CPLUS_INCLUDE_PATH
 unset OBJC_INCLUDE_PATH
 unset OBJCPLUS_INCLUDE_PATH
 
-export LIBRARY_PATH="${NATIVE_GCC}/lib:${NATIVE_GCC}/lib64"
+export LIBRARY_PATH="${NATIVE_GCC}/lib:${NATIVE_GCC}/lib64:${NATIVE_GCC_STATIC}/lib:${NATIVE_GCC_STATIC}/lib64"
 export C_INCLUDE_PATH="${NATIVE_GCC}/include"
 export CPLUS_INCLUDE_PATH="${NATIVE_GCC}/include/c++:${NATIVE_GCC}/include"
 export OBJC_INCLUDE_PATH="${NATIVE_GCC}/include"
@@ -76,8 +77,9 @@ case "$HOST" in
     *darwin*)
         # When targeting darwin, zlib is required by native_libdmg-hfsplus.
         zlib_store_path=$(store_path "zlib")
+        zlib_static_store_path=$(store_path "zlib" static)
 
-        prepend_to_search_env_var LIBRARY_PATH "${zlib_store_path}/lib"
+        prepend_to_search_env_var LIBRARY_PATH "${zlib_static_store_path}/lib:${zlib_store_path}/lib"
         prepend_to_search_env_var C_INCLUDE_PATH "${zlib_store_path}/include"
         prepend_to_search_env_var CPLUS_INCLUDE_PATH "${zlib_store_path}/include"
         prepend_to_search_env_var OBJC_INCLUDE_PATH "${zlib_store_path}/include"

contrib/guix/manifest.scm

@@ -214,6 +214,7 @@ chain for " target " development."))
         gzip
         xz
         zlib
+        (list zlib "static")
         ;; Build tools
         gnu-make
         libtool
@@ -227,7 +228,8 @@ chain for " target " development."))
         ;; Git
         git
         ;; Native gcc 7 toolchain
-        gcc-toolchain-7)
+        gcc-toolchain-7
+        (list gcc-toolchain-7 "static"))
   (let ((target (getenv "HOST")))
     (cond ((string-suffix? "-mingw32" target)
            ;; Windows

depends/packages/native_libdmg-hfsplus.mk

@@ -12,7 +12,7 @@ define $(package)_preprocess_cmds
 endef
 
 define $(package)_config_cmds
-  $($(package)_cmake) -DCMAKE_C_FLAGS="$$($(1)_cflags) -Wl,--build-id=none" -DCMAKE_SKIP_RPATH="ON" ..
+  $($(package)_cmake) -DCMAKE_C_FLAGS="$$($(1)_cflags) -Wl,--build-id=none" -DCMAKE_SKIP_RPATH="ON" -DCMAKE_EXE_LINKER_FLAGS="-static" -DCMAKE_FIND_LIBRARY_SUFFIXES=".a" ..
 endef
 
 define $(package)_build_cmds