Try to install niche compilers on ubuntu

.github/workflows/on_push.yml

@@ -116,6 +116,10 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
+    - name: Set up extra compilers (Linux)
+      if: ${{ matrix.os == ubuntu-latest }}
+      run: make icc pcc
+
     - name: Use Python 3.7
       uses: actions/setup-python@v5
       with:

c/Makefile

@@ -29,3 +29,33 @@ lint:
 	else \
 		clang-tidy *.c; \
 	fi
+
+ifeq ($(OS),Windows_NT)
+else
+pcc:
+	sudo apt-get install -y build-essential flex bison
+	mkdir pcc pcc-libs
+	wget -O - -o /dev/null http://pcc.ludd.ltu.se/ftp/pub/pcc-releases/pcc-1.1.0.tgz | tar -xz --no-seek -C pcc --strip-components=1
+	wget -O - -o /dev/null http://pcc.ludd.ltu.se/ftp/pub/pcc-releases/pcc-libs-1.1.0.tgz | tar -xz --no-seek -C pcc-libs --strip-components=1
+	cd pcc; \
+	sed -i 's/MANPAGE=@BINPREFIX@cpp/MANPAGE=@BINPREFIX@pcc-cpp/' cc/cpp/Makefile.in; \
+	./configure --prefix=/usr --libexecdir=/usr/lib/{x86_64,i386}-linux-gnu; \
+	sudo make && sudo make install; \
+	cd ../pcc-libs; \
+	./configure --prefix=/usr --libexecdir=/usr/lib/{x86_64,i386}-linux-gnu; \
+	sudo make && sudo make install
+
+icc:
+	mkdir iccdir
+	wget -O - -o /dev/null https://registrationcenter-download.intel.com/akdlm/irc_nas/15873/intel-sw-tools-installer.tar.gz | tar -xz --no-seek -C iccdir  --strip-components=1
+	sudo apt-get update
+	sudo apt-get install -y cpio
+	cd iccdir; \
+	sed -i -e "s/ACCEPT_EULA=decline/ACCEPT_EULA=accept/g" silent.cfg; \
+	sed -i -e "s/ACTIVATION_TYPE=no_license/ACTIVATION_TYPE=serial_number/g" silent.cfg; \
+	echo "ACTIVATION_SERIAL_NUMBER=CKDX-WNDG7BK7" >> silent.cfg; \
+	echo "SELECTION_CONFIG_FILES_PATH=$PWD/packages.json" >> silent.cfg; \
+	echo '{"selections":[{"moduleId":"intel_cpp_compiler"},{"moduleId":"intel_threading_building_blocks","isDependencyTool":true}]}' > packages.json; \
+	sudo ./install.sh -s silent.cfg; \
+	PATH="/opt/intel/system_studio_2019/bin${PATH:+:${PATH}}"; export PATH
+endif