update build script to supported github runner

also using gmplib mirror

.github/workflows/ccpp_mac.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build:
 
-    runs-on: macos-10.15
+    runs-on: macos-11
 
     steps:
     - uses: actions/checkout@v3
@@ -21,9 +21,9 @@ jobs:
       uses: actions/upload-artifact@v1.0.0
       with:
         name: nightly_macos.tar
-        path: build/Slic3r.tar
+        path: build/${{ github.event.repository.name }}.tar
     - name: Upload artifact
       uses: actions/upload-artifact@v1.0.0
       with:
         name: nightly_macos.dmg
-        path: build/Slic3r.dmg
+        path: build/${{ github.event.repository.name }}.dmg

.github/workflows/ccpp_mac_rc.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
 
-    runs-on: macos-latest
+    runs-on: macos-11
 
     steps:
     - uses: actions/checkout@v2
@@ -20,9 +20,9 @@ jobs:
       uses: actions/upload-artifact@v1.0.0
       with:
         name: rc_macos.tar
-        path: build/Slic3r.tar
+        path: build/${{ github.event.repository.name }}.tar
     - name: Upload artifact
       uses: actions/upload-artifact@v1.0.0
       with:
         name: rc_macos.dmg
-        path: build/Slic3r.dmg
+        path: build/${{ github.event.repository.name }}.dmg

.github/workflows/ccpp_ubuntu.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/ccpp_ubuntu_debug.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/ccpp_ubuntu_gtk3.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/ccpp_ubuntu_gtk3_debug.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/ccpp_ubuntu_gtk3_rc.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     env:
       EXEC_NAME: "${{ github.event.repository.name }}"

.github/workflows/ccpp_ubuntu_rc.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2

BuildLinux.sh

@@ -66,6 +66,7 @@ then
     echo -n -e "Updating linux ...\n"
     hwclock -s
     apt update
+	apt install g++ m4
     if [[ -z "$FOUND_GTK3" ]]
     then
         echo -e "\nInstalling: libgtk2.0-dev libglew-dev libudev-dev libdbus-1-dev cmake git\n"

deps/GMP/GMP.cmake

@@ -57,7 +57,8 @@ else ()
     endif ()
 
     ExternalProject_Add(dep_GMP
-        URL https://gmplib.org/download/gmp/gmp-6.2.1.tar.bz2
+        # URL https://gmplib.org/download/gmp/gmp-6.2.1.tar.bz2
+        URL https://github.com/supermerill/SuperSlicer_deps/releases/download/gmp-6.2.1/gmp-6.2.1.tar.bz2
         URL_HASH SHA256=eae9326beb4158c386e39a356818031bd28f3124cf915f8c5b1dc4c7a36b4d7c
         DOWNLOAD_DIR ${DEP_DOWNLOAD_DIR}/GMP
         BUILD_IN_SOURCE ON