ci: add more variants of unwinder to test matrices

Check x86_64 builds with libdw, with libunwind, and without stacktrace.
As Travis CI doesn't provide a suitable libdw, do not test libdw there.

* ci/install-dependencies.sh (common_packages): Remove libdw-dev.
Install libdw-dev or libunwind8-dev depending on $STACKTRACE.
* ci/run-build-and-tests.sh: Specify --with-libdw=yes,
--with-libunwind=yes, or --without-stacktrace depending on $STACKTRACE.
* .gitlab-ci.yml (gcc-x86_64): Rename to gcc-x86_64-libdw,
add STACKTRACE=libdw.
(gcc-x86): Rename to gcc-x86-nounwind, add STACKTRACE=no.
(clang-x86_64): Rename to clang-x86_64-libdw, add STACKTRACE=libdw.
(clang-x86): Rename to clang-x86-nounwind, add STACKTRACE=no.
(gcc-x86_64-libunwind, gcc-x86_64-nounwind, gcc-x86-nounwind,
clang-x86_64-libunwind, clang-x86_64-nounwind, clang-x86-nounwind):
New test matrix entries.
* .travis.yml: Add STACKTRACE=libunwind to all x86_64 test matrix
entries except musl-gcc, add STACKTRACE=no to other matrix entries,
add test matrix entries with STACKTRACE=no variants on x86_64.

.gitlab-ci.yml

@@ -8,30 +8,66 @@ variables:
   SLEEP_A_BIT: "sleep 0.2"
   VERBOSE: "1"
 
-gcc-x86_64:
+gcc-x86_64-libdw:
   stage: test
   script: ci/run-build-and-tests.sh
   variables:
     CC: "gcc"
     TARGET: "x86_64"
+    STACKTRACE: "libdw"
 
-gcc-x86:
+gcc-x86_64-libunwind:
+  stage: test
+  script: ci/run-build-and-tests.sh
+  variables:
+    CC: "gcc"
+    TARGET: "x86_64"
+    STACKTRACE: "libunwind"
+
+gcc-x86_64-nounwind:
+  stage: test
+  script: ci/run-build-and-tests.sh
+  variables:
+    CC: "gcc"
+    TARGET: "x86_64"
+    STACKTRACE: "no"
+
+gcc-x86-nounwind:
   stage: test
   script: ci/run-build-and-tests.sh
   variables:
     CC: "gcc"
     TARGET: "x86"
+    STACKTRACE: "no"
 
-clang-x86_64:
+clang-x86_64-libdw:
   stage: test
   script: ci/run-build-and-tests.sh
   variables:
     CC: "clang"
     TARGET: "x86_64"
+    STACKTRACE: "libdw"
 
-clang-x86:
+clang-x86_64-libunwind:
+  stage: test
+  script: ci/run-build-and-tests.sh
+  variables:
+    CC: "clang"
+    TARGET: "x86_64"
+    STACKTRACE: "libunwind"
+
+clang-x86_64-nounwind:
+  stage: test
+  script: ci/run-build-and-tests.sh
+  variables:
+    CC: "clang"
+    TARGET: "x86_64"
+    STACKTRACE: "no"
+
+clang-x86-nounwind:
   stage: test
   script: ci/run-build-and-tests.sh
   variables:
     CC: "clang"
     TARGET: "x86"
+    STACKTRACE: "no"

.travis.yml

@@ -21,35 +21,50 @@ matrix:
     - compiler: gcc
       env:
         - TARGET=x86_64
+        - STACKTRACE=libunwind
         - CHECK=coverage
         - KHEADERS=torvalds/linux
     - compiler: gcc
       env:
         - TARGET=x86_64
+        - STACKTRACE=libunwind
     - compiler: gcc
       env:
         - TARGET=x32
+        - STACKTRACE=no
     - compiler: gcc
       env:
         - TARGET=x86
+        - STACKTRACE=no
     - compiler: clang
       env:
         - TARGET=x86_64
+        - STACKTRACE=libunwind
     - compiler: musl-gcc
       env:
         - TARGET=x86_64
+        - STACKTRACE=no
     - compiler: clang
       env:
         - TARGET=x86
+        - STACKTRACE=no
     - compiler: musl-gcc
       env:
         - TARGET=x86
+        - STACKTRACE=no
     - compiler: gcc-7
       env:
         - TARGET=x86_64
+        - STACKTRACE=libunwind
     - compiler: gcc-7
       env:
         - TARGET=x32
+        - STACKTRACE=no
     - compiler: gcc-7
       env:
         - TARGET=x86
+        - STACKTRACE=no
+    - compiler: gcc
+      env:
+        - TARGET=x86_64
+        - STACKTRACE=no

ci/install-dependencies.sh

@@ -1,7 +1,7 @@
 #!/bin/sh -ex
 
 type sudo >/dev/null 2>&1 && sudo=sudo || sudo=
-common_packages='autoconf automake faketime file gawk gcc-multilib git gzip libdw-dev make pkg-config xz-utils'
+common_packages='autoconf automake faketime file gawk gcc-multilib git gzip make pkg-config xz-utils'
 
 updated=
 apt_get_install()
@@ -90,6 +90,15 @@ case "$CC" in
 		;;
 esac
 
+case "${STACKTRACE-}" in
+	libdw)
+		apt_get_install libdw-dev libz-dev liblzma-dev
+		;;
+	libunwind)
+		apt_get_install libunwind8-dev
+		;;
+esac
+
 case "${CHECK-}" in
 	coverage)
 		apt_get_install lcov

ci/run-build-and-tests.sh

@@ -24,6 +24,15 @@ case "${TARGET-}" in
 		;;
 esac
 
+case "${STACKTRACE-}" in
+	libdw|libunwind)
+		DISTCHECK_CONFIGURE_FLAGS="$DISTCHECK_CONFIGURE_FLAGS --with-$STACKTRACE"
+		;;
+	no)
+		DISTCHECK_CONFIGURE_FLAGS="$DISTCHECK_CONFIGURE_FLAGS --disable-stacktrace"
+		;;
+esac
+
 case "$KHEADERS" in
 	*/*)
 		CPPFLAGS='-isystem /opt/kernel/include'