CI: add gcc8,gcc7,gcc6

Author: mkannwischer

.github/workflows/benchmarks.yml

@@ -8,7 +8,7 @@ jobs:
   build-all:
     strategy:
       matrix:
-        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1]
+        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
     runs-on: ubuntu-latest
     name: benchmarks (gcc ${{ matrix.arm-gcc-release }})
     steps:

.github/workflows/mps2-an386.yml

@@ -8,7 +8,7 @@ jobs:
   build-all:
     strategy:
       matrix:
-        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1]
+        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
     runs-on: ubuntu-latest
     name: mps2-an386 build (gcc ${{ matrix.arm-gcc-release }})
     steps:

.github/workflows/nucleo-l4r5zi.yml

@@ -8,7 +8,7 @@ jobs:
   build-all:
     strategy:
       matrix:
-        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2]
+        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
     runs-on: ubuntu-latest
     name: nucleo-l4r5zi build (gcc ${{ matrix.arm-gcc-release }})
     steps:

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
   build-all:
     strategy:
       matrix:
-        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1]
+        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
     runs-on: ubuntu-latest
     name: test (gcc ${{ matrix.arm-gcc-release }})
     steps:

.github/workflows/testvectors.yml

@@ -8,7 +8,7 @@ jobs:
   build-all:
     strategy:
       matrix:
-        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1]
+        arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
     runs-on: ubuntu-latest
     name: testvectors (gcc ${{ matrix.arm-gcc-release }})
     steps: