build: Replace mkdir/mv commands with $(inst) func

This allows installation commands to be shorter and should fix:

	# C++ headers:
	mkdir -p \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/gcc/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//') \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/gcc/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')/fixed \
		dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//') \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//') \
		dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')/backward
	mv dest-amd64-linux-glibc/usr/lib/amd64-linux-glibc/gcc/$(oh-architecture amd64-linux-glibc)/$(printf '%s\n' '8.3.0+sip1' | sed 's/+sip.*//')/include/* \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/gcc/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')
	mv dest-amd64-linux-glibc/usr/lib/amd64-linux-glibc/gcc/$(oh-architecture amd64-linux-glibc)/$(printf '%s\n' '8.3.0+sip1' | sed 's/+sip.*//')/include-fixed/* \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/gcc/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')/fixed
	# def_gcc_gxx_tool_include_dir and def_gcc_gxx_backward_include_dir are
	# subdirectories of def_gcc_gxx_include_dir, so move them first.
	mv dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' '8.3.0+sip1' | sed 's/+sip.*//')/$(oh-architecture amd64-linux-glibc)/* \
		dest-amd64-linux-glibc/usr/include/amd64-linux-glibc/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')
	mv dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' '8.3.0+sip1' | sed 's/+sip.*//')/backward/* \
		dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')/backward
	mv dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' '8.3.0+sip1' | sed 's/+sip.*//')/* \
		dest-amd64-linux-glibc/usr/include/c++/$(printf '%s\n' 'gcc-8' | sed 's/^gcc-//')
	mv: can't rename 'dest-amd64-linux-glibc/usr/include/c++/8.3.0/backward': Directory not empty
	../build:150: recipe for target 'install-native' failed
	make[1]: *** [install-native] Error 1
	make[1]: Leaving directory '/prokit/sessions/445794320/wd/tmp'
	../build:308: recipe for target 'install' failed
	make: *** [install] Error 2

1 files changed, 35 insertions, 39 deletions

diff --git a/build b/build
index b229d27..5b66800 100755
--- a/build
+++ b/build
@@ -146,6 +146,16 @@ build-cross: build-gcc-config
 		-j $${JOBS:-$(jobs)} \
 		$(dir_macros)
 
+inst = set -e; \
+	inst() { \
+		i=0; for d in "$${@}"; do : $$((i += 1)); done; \
+		mkdir -p "$(destdir)$$(printf '%s\n' $${d} | sed 's|/.*$$||')";\
+		for s in "$${@}"; do [ $$((i -= 1)) -eq 0 ] && break; \
+			rm -Rf "$(destdir)$${d}"; \
+			mv "$(destdir)$${s}" "$(destdir)$${d}"; \
+		done; \
+	}; inst
+
 install-native:
 	# The -T option is necessary because otherwise:
 	#   * oh-autoinstall checks for an "install" target by running make with
@@ -168,44 +178,32 @@ install-native:
 		$(destdir)/usr/bin/$(target)-c++-$(base_version)
 	# Move files into ProteanOS-style directories.
 	# gcc programs:
-	mkdir -p $(destdir)$(gccexedir)
-	mv \
-		$(destdir)$(libsubdir)/cc1* \
-		$(destdir)$(libsubdir)/collect2 \
-		$(destdir)$(libsubdir)/lto* \
-		$(destdir)$(gccexedir)
+	$(inst) $(libsubdir)/cc1* \
+		$(libsubdir)/collect2 \
+		$(libsubdir)/lto* \
+		$(gccexedir)
 	# Start files and gcc libraries:
-	mkdir -p $(destdir)$(tgtlibdir)
-	mv \
-		$(destdir)$(libsubdir)/*.o \
-		$(destdir)$(libsubdir)/*.a \
-		$(destdir)$(libsubdir)/*.so* \
-		$(destdir)$(tgtlibdir)
+	$(inst) $(libsubdir)/*.o \
+		$(libsubdir)/*.a \
+		$(libsubdir)/*.so* \
+		$(tgtlibdir)
 	# C++ headers:
-	mkdir -p \
-		$(destdir)$(gcc_gcc_include_dir) \
-		$(destdir)$(gcc_fixed_include_dir) \
-		$(destdir)$(gcc_gxx_include_dir) \
-		$(destdir)$(gcc_gxx_tool_include_dir) \
-		$(destdir)$(gcc_gxx_backward_include_dir)
-	mv $(destdir)$(def_gcc_gcc_include_dir)/* \
-		$(destdir)$(gcc_gcc_include_dir)
-	mv $(destdir)$(def_gcc_fixed_include_dir)/* \
-		$(destdir)$(gcc_fixed_include_dir)
+	$(inst) $(def_gcc_gcc_include_dir) \
+		$(gcc_gcc_include_dir)
+	$(inst) $(def_gcc_fixed_include_dir) \
+		$(gcc_fixed_include_dir)
 	# def_gcc_gxx_tool_include_dir and def_gcc_gxx_backward_include_dir are
 	# subdirectories of def_gcc_gxx_include_dir, so move them first.
-	mv $(destdir)$(def_gcc_gxx_tool_include_dir)/* \
-		$(destdir)$(gcc_gxx_tool_include_dir)
-	mv $(destdir)$(def_gcc_gxx_backward_include_dir)/* \
-		$(destdir)$(gcc_gxx_backward_include_dir)
-	mv $(destdir)$(def_gcc_gxx_include_dir)/* \
-		$(destdir)$(gcc_gxx_include_dir)
+	$(inst) $(def_gcc_gxx_tool_include_dir) \
+		$(gcc_gxx_tool_include_dir)
+	$(inst) $(def_gcc_gxx_backward_include_dir) \
+		$(gcc_gxx_backward_include_dir)
+	$(inst) $(def_gcc_gxx_include_dir) \
+		$(gcc_gxx_include_dir)
 	# Target-arch libraries:
-	mkdir -p $(destdir)$(libdir)
-	mv $(destdir)$(libdir)/$(libsuffix)/* $(destdir)$(libdir)
+	$(inst) $(libdir)/$(libsuffix) $(libdir)
 	# Put libgcc_s.so.* under /lib.
-	mkdir -p $(destdir)/lib/$(OPK_HOST_ARCH)
-	mv $(destdir)$(libdir)/libgcc_s.so.* $(destdir)/lib/$(OPK_HOST_ARCH)
+	$(inst) $(libdir)/libgcc_s.so.* /lib/$(OPK_HOST_ARCH)
 	# Put *.so links in a versioned directory.   We want links to
 	# libfoo.so.x, not libfoo.x.y.z as libtool generates.
 	set -e; \
@@ -216,7 +214,7 @@ install-native:
 		ln -sf ../../$${lib} $(destdir)$(tgtlibdir)/$${link}; \
 	done
 	# Put *.o and *.spec files in a versioned directory.
-	mv $(destdir)$(libdir)/*.o $(destdir)$(libdir)/*.spec \
+	$(inst) $(destdir)$(libdir)/*.o $(destdir)$(libdir)/*.spec \
 		$(destdir)$(tgtlibdir)
 	# Remove libitm files.
 	rm -f $(destdir)$(libdir)/libitm.*
@@ -270,12 +268,10 @@ install-cross:
 	ln -s $(target)-g++-$(base_version) \
 		$(destdir)/usr/bin/$(target)-c++-$(base_version)
 	# Move files into ProteanOS-style directories.
-	mkdir -p $(destdir)$(gccexedir)
-	mv \
-		$(destdir)$(libsubdir)/cc1* \
-		$(destdir)$(libsubdir)/collect2 \
-		$(destdir)$(libsubdir)/lto* \
-		$(destdir)$(gccexedir)
+	$(inst) $(libsubdir)/cc1* \
+		$(libsubdir)/collect2 \
+		$(libsubdir)/lto* \
+		$(gccexedir)
 	rm -Rf \
 		$(destdir)$(libsubdir)/*.o \
 		$(destdir)$(libsubdir)/include* \