Use GCC 15 to compile when checking for warnings

This patch skips the alpine CI for now, as alpine seems to lack a gcc-15
package equivalent.

ChangeLog:

	* .github/workflows/ccpp.yml: Use GCC 15 for jobs which check
	for warnings.

Signed-off-by: Owen Avery <[email protected]>

Author: powerboat9

.github/workflows/ccpp.yml

@@ -19,13 +19,19 @@ jobs:
       # Force locale, in particular for reproducible results re '.github/log_expected_warnings' (see below).
       LC_ALL: C.UTF-8
 
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - uses: actions/checkout@v4
 
     - name: Install Deps
       run: |
+          sudo apt-get update;
+          sudo apt-get upgrade;
+          sudo sed -i 's/Prompt=lts/Prompt=normal/' /etc/update-manager/release-upgrades;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo add-apt-repository universe;
           sudo apt-get update;
           sudo apt-get install -y \
                   automake \
@@ -38,8 +44,7 @@ jobs:
                   libmpfr-dev \
                   libmpc-dev \
                   build-essential \
-                  gcc-multilib \
-                  g++-multilib \
+                  gcc-15 \
                   dejagnu;
           # install Rust directly using rustup
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=1.72.0;
@@ -104,13 +109,19 @@ jobs:
       # Force locale, in particular for reproducible results re '.github/log_expected_warnings' (see below).
       LC_ALL: C.UTF-8
 
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - uses: actions/checkout@v4
 
     - name: Install Deps
       run: |
+          sudo apt-get update;
+          sudo apt-get upgrade;
+          sudo sed -i 's/Prompt=lts/Prompt=normal/' /etc/update-manager/release-upgrades;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo add-apt-repository universe;
           sudo apt-get update;
           sudo apt-get install -y \
                   automake \
@@ -123,8 +134,7 @@ jobs:
                   libmpfr-dev \
                   libmpc-dev \
                   build-essential \
-                  gcc-multilib \
-                  g++-multilib \
+                  gcc-15 \
                   dejagnu;
           # install Rust directly using rustup
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=1.72.0;
@@ -189,13 +199,19 @@ jobs:
       # Force locale, in particular for reproducible results re '.github/log_expected_warnings' (see below).
       LC_ALL: C.UTF-8
 
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - uses: actions/checkout@v4
 
     - name: Install Deps
       run: |
+          sudo apt-get update;
+          sudo apt-get upgrade;
+          sudo sed -i 's/Prompt=lts/Prompt=normal/' /etc/update-manager/release-upgrades;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo do-release-upgrade -f DistUpgradeViewNonInteractive;
+          sudo add-apt-repository universe;
           sudo apt-get update;
           sudo apt-get install -y \
                   automake \
@@ -208,8 +224,7 @@ jobs:
                   libmpfr-dev \
                   libmpc-dev \
                   build-essential \
-                  gcc-multilib \
-                  g++-multilib \
+                  gcc-15 \
                   dejagnu;
           # install Rust directly using rustup
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=1.72.0;