ci: run some builders with response file threshold set to zero

.travis.yml

@@ -31,9 +31,10 @@ matrix:
     compiler: gcc
   include:
   # Test cross builds separately, they do not use the global compiler
+  # Also hijack one cross build to test long commandline handling codepath (and avoid overloading Travis)
   - os: linux
     compiler: gcc
-    env: RUN_TESTS_ARGS="--cross ubuntu-armhf.txt --cross linux-mingw-w64-64bit.txt"
+    env: RUN_TESTS_ARGS="--cross ubuntu-armhf.txt --cross linux-mingw-w64-64bit.txt" MESON_RSP_THRESHOLD=0
   - os: linux
     compiler: gcc
     env: RUN_TESTS_ARGS="--cross ubuntu-armhf.txt --cross linux-mingw-w64-64bit.txt" MESON_ARGS="--unity=on"

azure-pipelines.yml

@@ -22,6 +22,7 @@ jobs:
           arch: x86
           compiler: msvc2017
           backend: ninja
+          MESON_RSP_THRESHOLD: 0
         vc2017x64vs:
           arch: x64
           compiler: msvc2017
@@ -138,6 +139,7 @@ jobs:
       gccx64ninja:
         MSYSTEM: MINGW64
         MSYS2_ARCH: x86_64
+        MESON_RSP_THRESHOLD: 0
         compiler: gcc
       clangx64ninja:
         MSYSTEM: MINGW64

ci/travis_script.sh

@@ -23,6 +23,10 @@ export CXX=$CXX
 export OBJC=$CC
 export OBJCXX=$CXX
 export PATH=/root/tools:$PATH
+if test "$MESON_RSP_THRESHOLD" != ""
+then
+  export MESON_RSP_THRESHOLD=$MESON_RSP_THRESHOLD
+fi
 
 source /ci/env_vars.sh
 cd /root
@@ -55,5 +59,9 @@ elif [[ "$TRAVIS_OS_NAME" == "osx"   ]]; then
   export OBJC=$CC
   export OBJCXX=$CXX
   export PATH=$HOME/tools:/usr/local/opt/qt/bin:$PATH:$(brew --prefix llvm)/bin
+  if test "$MESON_RSP_THRESHOLD" != ""
+  then
+    export MESON_RSP_THRESHOLD=$MESON_RSP_THRESHOLD
+  fi
   ./run_tests.py $RUN_TESTS_ARGS --backend=ninja -- $MESON_ARGS
 fi