travis-ci: do out-of-tree build

.travis.yml

@@ -64,7 +64,7 @@ after_success:
                     sed -i -e 's/severity.capitalize!/severity = severity.capitalize/' $f
             done
         ) || :
-        lcov -c -b . -d . -o coverage.info && lcoveralls --root . --retry-count 5 coverage.info
+        (cd linux-gcc-gcov; lcov -c -b . -d . -o coverage.info && lcoveralls --root . --retry-count 5 coverage.info)
     fi
 
 # Build Matrix configuration

misc/travis-check.sh

@@ -25,31 +25,47 @@ SANDBOX_CASES=sandbox,sandbox-crash,sandbox-default-req,sandbox-unknown-submode
 if [ "$TARGET" = "Unix" ]; then
 
 	./autogen.sh
-	CONFIGURE_CMDLINE="./configure --enable-debugging --enable-iconv "
+	CONFIGURE_CMDLINE="../configure --enable-debugging --enable-iconv "
 
+	BUILDDIR0="$TRAVIS_OS_NAME"-"$CC"
     if [ "$TRAVIS_OS_NAME" = "linux" ] && [ "$CC" = "gcc" ]; then
 
+		BUILDDIR=${BUILDDIR0}
+		mkdir -p ${BUILDDIR}
+		(
+		cd ${BUILDDIR}
         ${CONFIGURE_CMDLINE}
         make -j2
         echo 'Run "make tmain (sandbox only)" without gcov'
         make -j2 tmain TRAVIS=1 UNITS=${SANDBOX_CASES}
 
         make clean
+		)
 
+		BUILDDIR=${BUILDDIR0}-gcov
+		mkdir -p ${BUILDDIR}
+		(
+		cd ${BUILDDIR}
 		${CONFIGURE_CMDLINE} --enable-coverage-gcov
         make -j2 COVERAGE=1
         echo 'List features'
         ./ctags --list-features
         echo 'Run "make check" with gcov'
         make -j2 check roundtrip TRAVIS=1
+		)
 
     else
+		BUILDDIR=${BUILDDIR0}
+		mkdir -p ${BUILDDIR}
+		(
+		cd ${BUILDDIR}
 		${CONFIGURE_CMDLINE}
         make -j2
         echo 'List features'
         ./ctags --list-features
         echo 'Run "make check" (without gcov)'
         make -j2 check roundtrip TRAVIS=1
+		)
     fi
 elif [ "$TARGET" = "Mingw32" ]; then
     make -j2 CC=i686-w64-mingw32-gcc CC_FOR_PACKCC=gcc -f mk_mingw.mak