companion_tools/m4: Add m4 tool

Add version 1.4.13 of m4 as a companion tool

Signed-off-by: Richard Strand <richard.strand@icomera.com>

config/companion_tools.in

@@ -10,6 +10,7 @@ config COMP_TOOLS
     prompt "Build some companion tools"
     help
       Crosstool-NG relies on some external tools to be recent enough, namely:
+        m4 >= 1.4.12
         autoconf >= 2.63
       
       If your system has older versions, we can build them for you,
@@ -17,6 +18,10 @@ config COMP_TOOLS
 
 if COMP_TOOLS
 
+config COMP_TOOLS_m4
+    bool
+    prompt "m4"
+
 config COMP_TOOLS_autoconf
     bool
     prompt "autoconf"

scripts/build/companion_tools/100-m4.sh

@@ -0,0 +1,27 @@
+# Build script for m4
+
+CT_M4_VERSION=1.4.13
+
+do_companion_tools_m4_get() {
+    CT_GetFile "m4-${CT_M4_VERSION}" \
+               {ftp,http}://ftp.gnu.org/gnu/m4
+}
+
+do_companion_tools_m4_extract() {
+    CT_Extract "m4-${CT_M4_VERSION}"
+    CT_Patch "m4-${CT_M4_VERSION}"
+}
+
+do_companion_tools_m4_build() {
+    CT_DoStep EXTRA "Installing m4"
+    mkdir -p "${CT_BUILD_DIR}/build-m4"
+    CT_Pushd "${CT_BUILD_DIR}/build-m4"
+    
+    CT_DoExecLog ALL \
+    "${CT_SRC_DIR}/m4-${CT_M4_VERSION}/configure" \
+        --prefix="${CT_TOOLS_OVERIDE_DIR}"
+    CT_DoExecLog ALL make
+    CT_DoExecLog ALL make install
+    CT_Popd
+    CT_EndStep
+}