CI: also check with ICC

* build-aux/install-icc.sh: New.
* .travis.yml (icc): New.
Use -k to get as many errors as possible from the start.
* src/complain.c (warnings_types): Use a more precise type.

.travis.yml

@@ -1,5 +1,10 @@
 language: cpp
 
+env:
+  global:
+    # ICC serial number.
+    secure: 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
+
 matrix:
   include:
     ## ----- ##
@@ -170,6 +175,16 @@ matrix:
         # No versioned name installed.
         - MATRIX_EVAL="CC=clang && CXX=clang++ && CXXFLAGS=-stdlib=libc++"
 
+    ## ----- ##
+    ## ICC.  ##
+    ## ----- ##
+    - os: linux
+      env:
+        # ICC's warnings are often very wrong (e.g., it thinks foo ?
+        # "bar" : "baz" is char* instead of const char*), so don't try
+        # to work around the, and obviously, don't die on them.
+        - MATRIX_EVAL="CC=icc && CXX=icpc && MAKE_ARGS='WERROR_CFLAGS= WERROR_CXXFLAGS='"
+
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq autoconf automake autopoint doxygen flex gettext graphviz help2man m4 texinfo
@@ -184,6 +199,7 @@ before_install:
   - m4 --version
   - makeinfo --version
   - eval "${MATRIX_EVAL}"
+  - if [ x"$CC" == xicc ]; then build-aux/install-icc.sh; fi
 
 script:
   - git show
@@ -193,8 +209,12 @@ script:
   - git describe || git tag v3.0 -m "Fake version 3.0."
   - git describe
   - ./bootstrap
+  - if [[ -f ~/.bashrc ]]; then source ~/.bashrc; fi
   - ./configure --enable-gcc-warnings CC="$CC" CXX="$CXX" || { cat config.log && exit 1; }
-  - make -j2
-  - make check                     VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
-  - make maintainer-check-posix    VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
-  - make maintainer-check-g++      VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
+  - make -j2 $MAKE_ARGS
+  - make check                  VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
+  - make maintainer-check-posix VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
+  - make maintainer-check-g++   VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && exit 1; }
+
+after_script:
+  - '[[ ! -z "${INTEL_INSTALL_PATH}" ]] && uninstall_intel_software'