travis: do coverage using a dedicated build

* .travis.yml (after_success): Remove.
(matrix): Create an entry for the regular x86_64 target.
* travis-success.sh: Merge into ...
* travis-build.sh: ... this file.  Disable optimization
for coverage builds.
* travis-install.sh: Rename COVERAGE=true to CHECK=coverage.

.travis.yml

@@ -6,8 +6,6 @@ before_install: ./travis-install.sh
 
 script: ./travis-build.sh
 
-after_success: ./travis-success.sh
-
 sudo: required
 
 git:
@@ -23,7 +21,6 @@ matrix:
     - compiler: gcc
       env:
         - TARGET=x86_64
-        - COVERAGE=true
     - compiler: gcc
       env:
         - TARGET=x32
@@ -42,3 +39,7 @@ matrix:
     - compiler: musl-gcc
       env:
         - TARGET=x86
+    - compiler: gcc
+      env:
+        - TARGET=x86_64
+        - CHECK=coverage

travis-build.sh

@@ -17,7 +17,17 @@ case "${TARGET-}" in
 		;;
 	x86)
 		CC="$CC -m32"
-		export DISTCHECK_CONFIGURE_FLAGS='--build=i686-pc-linux-gnu --target=i686-pc-linux-gnu'
+		DISTCHECK_CONFIGURE_FLAGS='--build=i686-pc-linux-gnu --target=i686-pc-linux-gnu'
+		export DISTCHECK_CONFIGURE_FLAGS
+		;;
+esac
+
+case "${CHECK-}" in
+	coverage)
+		CHECK_CONFIGURE_FLAGS=--enable-code-coverage
+		CFLAGS='-g -O0'
+		CFLAGS_FOR_BUILD="$CFLAGS"
+		export CFLAGS CFLAGS_FOR_BUILD
 		;;
 esac
 
@@ -26,7 +36,21 @@ export CC_FOR_BUILD="$CC"
 
 ./git-set-file-times
 ./bootstrap
-./configure --enable-maintainer-mode ${ENABLE_GCC_WERROR-} ${DISTCHECK_CONFIGURE_FLAGS-}
+./configure --enable-maintainer-mode \
+	${ENABLE_GCC_WERROR-} \
+	${DISTCHECK_CONFIGURE_FLAGS-} \
+	${CHECK_CONFIGURE_FLAGS-} \
+	#
 
 j=-j`getconf _NPROCESSORS_ONLN 2> /dev/null` || j=
-make -k $j distcheck VERBOSE=${VERBOSE-}
+
+case "${CHECK-}" in
+	coverage)
+		make -k $j all VERBOSE=${VERBOSE-}
+		make -k $j check VERBOSE=${VERBOSE-}
+		codecov --gcov-args=-abcp ||:
+		;;
+	*)
+		make -k $j distcheck VERBOSE=${VERBOSE-}
+		;;
+esac

travis-install.sh

@@ -47,7 +47,9 @@ case "$CC" in
 		;;
 esac
 
-if [ "${COVERAGE-}" = true ]; then
-	apt_get_install lcov
-	pip install --user codecov
-fi
+case "${CHECK-}" in
+	coverage)
+		apt_get_install lcov
+		pip install --user codecov
+		;;
+esac

travis-success.sh

@@ -1,12 +0,0 @@
-#!/bin/sh -ex
-
-if [ "${COVERAGE-}" = true ]; then
-	set -- strace-*.tar.xz
-	tar -xf "$1"
-	dir="${1%.tar.xz}"
-	cd "$dir"
-	export CC_FOR_BUILD="$CC"
-	./configure --enable-code-coverage
-	make -k $j all check VERBOSE=${VERBOSE-}
-	codecov --gcov-args=-abcp ||:
-fi