Create tools.cfg
ADD
cfg/tools.cfg
+[cmake@linuxx86_64]
+toolid = cmake
+version = 3.9.1
+groupId = org.cmake.download.cmake
+artifactId = cmake
+classifier = linux_x64
+type = tar.gz
+path = {toolid}-{version}-Linux-x86_64
+executable = bin/cmake
+runtimes = linuxx86_64
+
+[gcc@linuxx86_64]
+toolid = gcc
+version = 9.2.1-sap5
+groupId = com.sap.external.org.gnu.gcc
+artifactId = gcc
+classifier = linux_x64
+runtime = group,classifier
+type = tar.gz
+path = {toolid}-{version}-{runtime}
+run_path = bin
+runtimes = linuxx86_64
+env{CC} = gcc
+env{CXX} = g++

Create tools.cfg