change buildscript to use github mirror

Sourceforge can be unreliable at times and gives
weird errors, and since we already depend on github
anyway for the sbcl source, we might as well change
the sourceforge dependency from maxima to a github
mirror.

buildscript.sh

@@ -7,10 +7,9 @@ echo ${MAXIMA_VERSION?Error \$MAXIMA_VERSION is not defined} \
      ${SBCL_VERSION?Error \$SBCL_VERSION is not defined}
 
 apt-get update
-apt-get install -y bzip2 make wget python3 gcc texinfo curl libcap2-bin
+apt-get install -y bzip2 make wget python3 gcc texinfo curl libcap2-bin git autoconf
 
 mkdir -p ${SRC}
-wget "https://sourceforge.net/projects/maxima/files/Maxima-source/${MAXIMA_VERSION}-source/maxima-${MAXIMA_VERSION}.tar.gz" -O "${SRC}/maxima-${MAXIMA_VERSION}.tar.gz"
 wget "https://github.com/sbcl/sbcl/archive/refs/tags/sbcl-${SBCL_VERSION}.tar.gz" -O "${SRC}/sbcl-${SBCL_VERSION}.tar.gz"
 
 # Compile sbcl (installs and removes debian sbcl for bootstrapping)
@@ -24,11 +23,11 @@ echo "\"$SBCL_VERSION\"" > version.lisp-expr
 apt remove -y sbcl
 ./install.sh
 
-# Compile maxima
 cd ${SRC}
-tar -xf maxima-${MAXIMA_VERSION}.tar.gz
-rm maxima-${MAXIMA_VERSION}.tar.gz
-cd maxima-${MAXIMA_VERSION}
+git clone --depth 1 --branch "$MAXIMA_VERSION" "https://github.com/mathinstitut/maxima-mirror" maxima
+# Compile maxima
+cd maxima
+autoreconf -i
 ./configure
 make
 make install
@@ -43,5 +42,5 @@ gcc -shared maxima_fork.c -lbsd -fPIC -Wall -Wextra -DN_SLOT="${MAX_USER}" -o li
 mv libmaximafork.so /usr/lib
 rm -r ${SRC} /maxima_fork.c
 mkdir -p ${LIB} ${LOG} ${TMP} ${PLOT} ${ASSETS} ${BIN}
-apt-get purge -y bzip2 make wget python3 gcc texinfo
+apt-get purge -y bzip2 make wget python3 gcc texinfo libcap2-bin git autoconf
 apt-get autoremove -y