doc

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ on:
 
 jobs:
 
-  core-gcc:
+  gcc-12-13-14:
     timeout-minutes: 15
 
     strategy:
@@ -59,7 +59,7 @@ jobs:
     - uses: ./.github/workflows/composite-unix
 
 
-  gcc-old:
+  gcc-9-10-11:
     timeout-minutes: 15
 
     strategy:

Install.md

@@ -44,7 +44,7 @@ cmake -B build -Dh5fortran_ROOT=~/h5fortran/
 and in your CMakeLists.txt
 
 ```cmake
-cmake_minimum_required(VERSION 3.14...3.20)
+cmake_minimum_required(VERSION 3.20)
 project(myProject LANGUAGES Fortran)
 
 find_package(h5fortran)

README.md

@@ -93,7 +93,14 @@ cmake -B build
 cmake --build build
 ```
 
-for more details see [Install.md](./Install.md).
+By default, h5fortran CMake doesn't specify optimization flags to help working with old compilers like GCC 7.
+To enable optimization, set:
+
+```sh
+cmake -Bbuild -DCMAKE_BUILD_TYPE=Release
+```
+
+For more details see [Install.md](./Install.md).
 
 For general use with non-CMake build systems, "h5fortran.pc" pkg-config file is also generated / installed.