Trying to fix automated gcc7.5.0 build of clatexmath, again

install-clatexmath.sh

@@ -2,21 +2,38 @@
 git clone https://github.com/NanoMichael/cLaTeXMath.git
 cd cLaTeXMath
 git reset --hard HEAD
+# patch out C++17 feature use in code, but compile with -std=c++17
 (cat <<EOF
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9654360..a070437 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
 @@ -25,10 +25,6 @@ else ()
              # needs extra lib to use std::filesystem
              target_link_libraries(LaTeX PUBLIC "stdc++fs")
          endif ()
--        if ("\${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 8)
+-        if ("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 8)
 -            # dose not have full c++17 features
 -            set(COMPILER_SUPPORTS_CXX17 OFF)
 -        endif ()
      endif ()
  
      if (COMPILER_SUPPORTS_CXX17)
-EOF
+diff --git a/src/config.h b/src/config.h
+index b43a395..d8aabe5 100644
+--- a/src/config.h
++++ b/src/config.h
+@@ -40,10 +40,6 @@
+ #include "vcruntime.h"
+ #endif
+ 
+-#if (__cplusplus >= 201703L) || (defined(_MSC_VER) && defined(_HAS_CXX17) && _HAS_CXX17)
+-#define CLATEX_CXX17 1
+-#else
+ #define CLATEX_CXX17 0
+-#endif
+ 
+ #endif  // CONFIG_H_INCLUDED
 ) | patch -p1
 cmake -DCMAKE_BUILD_TYPE=Release -DHAVE_LOG=OFF -DGRAPHICS_DEBUG=OFF .
 make