Update everything to reference the simpler tool autodetection

.github/workflows/tests.yml

@@ -386,8 +386,6 @@ jobs:
         run: |
           # This will warn about CC, but we cannot set CC until we run it :-S
           HOST_TRIPLET=$(dpkg-architecture -a${{ matrix.arch }} -q DEB_HOST_GNU_TYPE)
-          export CC=$HOST_TRIPLET-gcc
-          export AR=$HOST_TRIPLET-ar
           ./autogen.sh
           ./configure --host $HOST_TRIPLET
           cd packages/debian/
@@ -598,7 +596,6 @@ jobs:
           # this is a hack! it assumes the default SDK is the 'right' one
           export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
           ./autogen.sh
-          export CC=clang
           export CFLAGS="-target ${{ matrix.arch }}"
           export LDFLAGS="-target ${{ matrix.arch }}"
           ./configure --host=${{ matrix.arch }}
@@ -647,7 +644,6 @@ jobs:
           # this is a hack! it assumes the default SDK is the 'right' one
           export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
           ./autogen.sh
-          export CC=clang
           export CFLAGS="-arch x86_64 -arch arm64"
           export LDFLAGS="-arch x86_64 -arch arm64"
           ./configure
@@ -703,9 +699,6 @@ jobs:
         shell: bash
         run: |
           ./autogen.sh
-          export CC=${{ matrix.arch }}-gcc
-          export AR=${{ matrix.arch }}-ar
-          export WINDRES=${{ matrix.arch }}-windres
           ./configure --host ${{ matrix.arch }}
           make
 

doc/Building.md

@@ -103,7 +103,7 @@ See `edge.exe --help` and `supernode.exe --help` for a full list of supported op
 The Makefiles are all setup to allow cross compiling of this code.  You
 will need to have the cross compiler, binutils and any additional libraries
 desired installed for the target architecture.  Then you can run the `./configure`
-with the appropriate CC and AR environment and the right `--host` option.
+with the appropriate `--host` option.
 
 If compiling on Debian or Ubuntu, this can be as simple as the following example:
 
@@ -111,8 +111,6 @@ If compiling on Debian or Ubuntu, this can be as simple as the following example
 HOST_TRIPLET=arm-linux-gnueabi
 sudo apt-get install binutils-$HOST_TRIPLET gcc-$HOST_TRIPLET
 ./autogen.sh
-export CC=$HOST_TRIPLET-gcc
-export AR=$HOST_TRIPLET-ar
 ./configure --host $HOST_TRIPLET
 make
 ```

scripts/hack_fakeautoconf.sh

@@ -6,6 +6,7 @@
 cat >config.mak <<EOF
 CC=gcc
 AR=ar
+WINDRES=windres
 CFLAGS=$CFLAGS -g -O2 -I./include
 LDFLAGS=$LDFLAGS -L.
 LDLIBS_EXTRA=$LDLIBS