Jenkins: Fix toolchain file path when reusing libraries

.ci/build.sh

@@ -230,6 +230,7 @@ case $arch in
 	*)		toolchain="$toolchain_prefix-$arch";;
 esac
 [ ! -e "cmake/$toolchain.cmake" ] && toolchain=flags-gcc
+toolchain_file="cmake/$toolchain.cmake"
 
 # Perform platform-specific setup.
 strip_binary=strip
@@ -380,9 +381,6 @@ then
 	else
 		echo [-] Not installing dependencies again
 	fi
-
-	# Point CMake to the toolchain file.
-	[ -e "cmake/$toolchain.cmake" ] && cmake_flags_extra="$cmake_flags_extra -D \"CMAKE_TOOLCHAIN_FILE=cmake/$toolchain.cmake\""
 elif is_mac
 then
 	# macOS lacks nproc, but sysctl can do the same job.
@@ -577,9 +575,6 @@ then
 		echo [-] Not installing dependencies again
 
 	fi
-
-	# Point CMake to the toolchain file.
-	[ -e "cmake/$toolchain.cmake" ] && cmake_flags_extra="$cmake_flags_extra -D \"CMAKE_TOOLCHAIN_FILE=cmake/$toolchain.cmake\""
 else
 	# Determine Debian architecture.
 	case $arch in
@@ -634,8 +629,12 @@ else
 		*)	libdir="$arch_triplet";;
 	esac
 
-	# Create CMake toolchain file.
+	# Create CMake cross toolchain file. The file is saved on a fixed location for
-	cat << EOF > toolchain.cmake
+	# the library builds we do later, since running CMake again on a library we've
+	# already built before will *not* update its toolchain file path; therefore, we
+	# cannot point them to our working directory, which may change across builds.
+	toolchain_file_new="$cache_dir/toolchain.$arch_deb.cmake"
+	cat << EOF > "$toolchain_file_new"
 set(CMAKE_SYSTEM_NAME Linux)
 set(CMAKE_SYSTEM_PROCESSOR $arch)
 
@@ -656,9 +655,9 @@ set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(ENV{PKG_CONFIG_PATH} "")
 set(ENV{PKG_CONFIG_LIBDIR} "/usr/lib/$libdir/pkgconfig:/usr/share/$libdir/pkgconfig")
 
-include("$(pwd)/cmake/$toolchain.cmake")
+include("$(realpath "$toolchain_file")")
 EOF
-	cmake_flags_extra="$cmake_flags_extra -D CMAKE_TOOLCHAIN_FILE=toolchain.cmake"
+	toolchain_file="$toolchain_file_new"
 	strip_binary="$arch_triplet-strip"
 
 	# Install dependencies only if we're in a new build and/or architecture.
@@ -688,6 +687,9 @@ EOF
 	cmake_flags_extra="$cmake_flags_extra -D SLIRP_EXTERNAL=ON"
 fi
 
+# Point CMake to the toolchain file.
+[ -e "$toolchain_file" ] && cmake_flags_extra="$cmake_flags_extra -D \"CMAKE_TOOLCHAIN_FILE=$toolchain_file\""
+
 # Clean workspace.
 echo [-] Cleaning workspace
 rm -rf build
@@ -864,7 +866,7 @@ else
 			wget -qO - https://github.com/kcat/openal-soft/archive/refs/tags/1.21.1.tar.gz | tar zxf - -C "$cache_dir" || rm -rf "$prefix"
 		fi
 		prefix_build="$prefix/build-$arch_deb"
-		cmake -G Ninja -D "CMAKE_TOOLCHAIN_FILE=$cwd_root/toolchain.cmake" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
+		cmake -G Ninja -D "CMAKE_TOOLCHAIN_FILE=$toolchain_file" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
 		cmake --build "$prefix_build" -j$(nproc) || exit 99
 		cmake --install "$prefix_build" || exit 99
 
@@ -880,7 +882,7 @@ else
 			wget -qO - https://github.com/FNA-XNA/FAudio/archive/refs/tags/22.03.tar.gz | tar zxf - -C "$cache_dir" || rm -rf "$prefix"
 		fi
 		prefix_build="$prefix/build-$arch_deb"
-		cmake -G Ninja -D "CMAKE_TOOLCHAIN_FILE=$cwd_root/toolchain.cmake" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
+		cmake -G Ninja -D "CMAKE_TOOLCHAIN_FILE=$toolchain_file" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
 		cmake --build "$prefix_build" -j$(nproc) || exit 99
 		cmake --install "$prefix_build" || exit 99
 
@@ -900,7 +902,7 @@ else
 		wget -qO - https://github.com/thestk/rtmidi/archive/refs/tags/4.0.0.tar.gz | tar zxf - -C "$cache_dir" || rm -rf "$prefix"
 	fi
 	prefix_build="$prefix/build-$arch_deb"
-	cmake -G Ninja -D RTMIDI_API_JACK=OFF -D "CMAKE_TOOLCHAIN_FILE=$cwd_root/toolchain.cmake" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
+	cmake -G Ninja -D RTMIDI_API_JACK=OFF -D "CMAKE_TOOLCHAIN_FILE=$toolchain_file" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" -S "$prefix" -B "$prefix_build" || exit 99
 	cmake --build "$prefix_build" -j$(nproc) || exit 99
 	cmake --install "$prefix_build" || exit 99
 
@@ -930,7 +932,7 @@ else
 		-D SDL_ATOMIC=OFF -D SDL_EVENTS=ON -D SDL_HAPTIC=OFF -D SDL_POWER=OFF -D SDL_THREADS=ON -D SDL_TIMERS=ON -D SDL_FILE=OFF \
 		-D SDL_LOADSO=ON -D SDL_CPUINFO=ON -D SDL_FILESYSTEM=$sdl_ui -D SDL_DLOPEN=OFF -D SDL_SENSOR=OFF -D SDL_LOCALE=OFF \
 		\
-		-D "CMAKE_TOOLCHAIN_FILE=$cwd_root/toolchain.cmake" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" \
+		-D "CMAKE_TOOLCHAIN_FILE=$toolchain_file" -D "CMAKE_INSTALL_PREFIX=$cwd_root/archive_tmp/usr" \
 		-S "$prefix" -B "$prefix_build" || exit 99
 	cmake --build "$prefix_build" -j$(nproc) || exit 99
 	cmake --install "$prefix_build" || exit 99