add an `any` configuration that uses existing GCC installs

.gitignore

@@ -1,6 +1,7 @@
 # Everything but the scripts
 *
 !giteapc.make
+!giteapc-config-any.make
 !configure.sh
 !build.sh
 !install.sh

README.md

@@ -11,3 +11,9 @@ You can also install manually. First install [`sh-elf-binutils`](https://gitea.p
 ```
 % make -f giteapc.make configure build install PREFIX=$HOME/.local
 ```
+
+An `any` configuration is provided in case GCC is already installed externally, to have this package installed without rebuilding it.
+
+```
+% giteapc install Lephenixnoir/sh-elf-gcc:any
+```

configure.sh

@@ -19,6 +19,15 @@ if [[ -f "$existing_gcc" ]]; then
   fi
 fi
 
+# Aggressive parameter to avoid rebuilds
+
+if [[ ! -z "$ACCEPT_ANY" ]]; then
+  if command -v sh-elf-gcc >/dev/null 2>&1; then
+    echo "$TAG sh-elf-gcc in PATH and ACCEPT_ANY is set, skipping build"
+    exit 0
+  fi
+fi
+
 # Download archive
 
 if [[ -f "$ARCHIVE" ]]; then

giteapc-config-any.make

@@ -0,0 +1,4 @@
+# Accept any version installed anywhere; try as hard as possible to not build
+ACCEPT_ANY=1
+
+export ACCEPT_ANY

giteapc.make

@@ -4,9 +4,7 @@
 PREFIX ?= $(GITEAPC_PREFIX)
 VERSION = 10.2.0
 
-ifneq ($(GITEAPC_CONFIG),)
-include giteapc-config-$(GITEAPC_CONFIG).make
-endif
+-include giteapc-config.make
 
 configure:
 	@ ./configure.sh $(VERSION) "$(PREFIX)"