Add possibility to split test suit build targets and improved CI configuration

- Introduce CMake option `EIGEN_SPLIT_TESTSUITE` that allows to divide the single test build target into several subtargets
- Add CI pipeline for merge request that can be run by GitLab's shared runners
- Add nightly CI pipeline
diff --git a/.gitignore b/.gitignore
index fc0e548..6b96995 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,3 +35,4 @@
 .*project
 .settings
 Makefile
+!ci/build-tests.gitlab-ci.yml
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0b860dd..356565b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,78 +13,10 @@
   - doc
 
 variables:
-  CMAKE_GENERATOR: "Ninja"
-  BUILDDIR: builddir 
+  BUILDDIR: builddir
+  EIGEN_CI_CMAKE_GENEATOR: "Ninja"
+  EIGEN_CI_TESTSUITE_SIZE: 15
 
-.build-tests:
-  allow_failure: true
-  stage: build
-  image: fedora:31
-  before_script:
-    - dnf -y install gcc-c++-9.2.1 cmake make ninja-build
-  script:
-    - cmake -B ${BUILDDIR} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11}
-    - cmake --build ${BUILDDIR} --target buildtests
-  cache:
-    key: "build-cache-cxx11-${EIGEN_TEST_CXX11}"
-    paths:
-      - ${BUILDDIR}/
-    policy: push
-  artifacts:
-    name: "$CI_JOB_NAME-$CI_COMMIT_REF_NAME"
-    paths:
-      - ${BUILDDIR}/
-    expire_in: 5 days
-
-.run_tests:
-  allow_failure: true
-  stage: test
-  image: fedora:31
-  before_script:
-    - dnf -y install gcc-c++-9.2.1 cmake make ninja-build
-  script:
-    - cd ${BUILDDIR} && ctest --output-on-failure
-  cache:
-    key: "build-cache-cxx11-${EIGEN_TEST_CXX11}"
-    paths:
-      - ${BUILDDIR}/
-    policy: pull
-
-build-test-cxx11-on:
-  extends: .build-tests
-  variables:
-    EIGEN_TEST_CXX11: "ON"
-
-build-test-cxx11-off:
-  extends: .build-tests
-  variables:
-    EIGEN_TEST_CXX11: "OFF"
-
-run-tests-cxx11-on:
-  extends: .run_tests
-  variables:
-    EIGEN_TEST_CXX11: "ON"
-  needs: ["build-test-cxx11-on"]
-
-run-tests-cxx11-off:
-  extends: .run_tests
-  variables:
-    EIGEN_TEST_CXX11: "OFF"
-  needs: ["build-test-cxx11-off"]
-
-build-doc:
-  image: fedora:31
-  only:
-    - schedules
-  stage: doc
-  before_script:
-    - dnf -y install gcc-c++-9.2.1 cmake make doxygen doxygen-latex
-  script:
-    - cmake -G "Unix Makefiles" -B ${BUILDDIR} -DCMAKE_BUILD_TYPE=Release
-    - cmake --build ${BUILDDIR} --target doc
-  artifacts:
-    name: "$CI_JOB_NAME-$CI_JOB_ID"
-    paths:
-      - ${BUILDDIR}/doc/html
-    expire_in: 2 days
-  needs: []
+include:
+  - "/ci/build-tests.gitlab-ci.yml"
+  - "/ci/run-tests.gitlab-ci.yml"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 818f4a5..ef78e3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -664,3 +664,7 @@
 # Add uninstall target
 add_custom_target ( uninstall
     COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/EigenUninstall.cmake)
+
+if (EIGEN_SPLIT_TESTSUITE)
+  ei_split_testsuite("${EIGEN_SPLIT_TESTSUITE}")
+endif()
\ No newline at end of file
diff --git a/ci/CTest2JUnit.xsl b/ci/CTest2JUnit.xsl
new file mode 100644
index 0000000..8ba21f4
--- /dev/null
+++ b/ci/CTest2JUnit.xsl
@@ -0,0 +1,120 @@
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+<xsl:output method="xml" indent="yes"/>
+    <xsl:template match="/Site">
+	<xsl:variable name="Name"><xsl:value-of select="@Name"/></xsl:variable>
+	<xsl:variable name="Hostname"><xsl:value-of select="@Hostname"/></xsl:variable>
+	<xsl:variable name="TestCount"><xsl:value-of select="count(//TestList/Test)"/> </xsl:variable>
+	<xsl:variable name="ErrorCount"><xsl:value-of select="count(//TestList/Test[@Status='error'])"/> </xsl:variable>
+	<xsl:variable name="FailureCount"><xsl:value-of select="count(//Testing/Test[@Status='failed'])"/> </xsl:variable>
+	<testsuite name="{$Name}" hostname="{$Hostname}" errors="0" failures="{$FailureCount}" tests="{$TestCount}">
+	    <xsl:variable name="BuildName"><xsl:value-of select="@BuildName"/></xsl:variable>
+	    <xsl:variable name="BuildStamp"><xsl:value-of select="@BuildStamp"/></xsl:variable>
+	    <xsl:variable name="Generator"><xsl:value-of select="@Generator"/></xsl:variable>
+	    <xsl:variable name="CompilerName"><xsl:value-of select="@CompilerName"/></xsl:variable>
+	    <xsl:variable name="OSName"><xsl:value-of select="@OSName"/></xsl:variable>
+	    <xsl:variable name="OSRelease"><xsl:value-of select="@OSRelease"/></xsl:variable>
+	    <xsl:variable name="OSVersion"><xsl:value-of select="@OSVersion"/></xsl:variable>
+	    <xsl:variable name="OSPlatform"><xsl:value-of select="@OSPlatform"/></xsl:variable>
+	    <xsl:variable name="Is64Bits"><xsl:value-of select="@Is64Bits"/></xsl:variable>
+	    <xsl:variable name="VendorString"><xsl:value-of select="@VendorString"/></xsl:variable>
+	    <xsl:variable name="VendorID"><xsl:value-of select="@VendorID"/></xsl:variable>
+	    <xsl:variable name="FamilyID"><xsl:value-of select="@FamilyID"/></xsl:variable>
+	    <xsl:variable name="ModelID"><xsl:value-of select="@ModelID"/></xsl:variable>
+	    <xsl:variable name="ProcessorCacheSize"><xsl:value-of select="@ProcessorCacheSize"/></xsl:variable>
+	    <xsl:variable name="NumberOfLogicalCPU"><xsl:value-of select="@NumberOfLogicalCPU"/></xsl:variable>
+	    <xsl:variable name="NumberOfPhysicalCPU"><xsl:value-of select="@NumberOfPhysicalCPU"/></xsl:variable>
+	    <xsl:variable name="TotalVirtualMemory"><xsl:value-of select="@TotalVirtualMemory"/></xsl:variable>
+	    <xsl:variable name="TotalPhysicalMemory"><xsl:value-of select="@TotalPhysicalMemory"/></xsl:variable>
+	    <xsl:variable name="LogicalProcessorsPerPhysical"><xsl:value-of select="@LogicalProcessorsPerPhysical"/></xsl:variable>
+	    <xsl:variable name="ProcessorClockFrequency"><xsl:value-of select="@ProcessorClockFrequency"/></xsl:variable>
+	    <properties>
+		<property name="BuildName" value="{$BuildName}" />
+		<property name="BuildStamp" value="{$BuildStamp}" />
+		<property name="Name" value="{$Name}" />
+		<property name="Generator" value="{$Generator}" />
+		<property name="CompilerName" value="{$CompilerName}" />
+		<property name="OSName" value="{$OSName}" />
+		<property name="Hostname" value="{$Hostname}" />
+		<property name="OSRelease" value="{$OSRelease}" />
+		<property name="OSVersion" value="{$OSVersion}" />
+		<property name="OSPlatform" value="{$OSPlatform}" />
+		<property name="Is64Bits" value="{$Is64Bits}" />
+		<property name="VendorString" value="{$VendorString}" />
+		<property name="VendorID" value="{$VendorID}" />
+		<property name="FamilyID" value="{$FamilyID}" />
+		<property name="ModelID" value="{$ModelID}" />
+		<property name="ProcessorCacheSize" value="{$ProcessorCacheSize}" />
+		<property name="NumberOfLogicalCPU" value="{$NumberOfLogicalCPU}" />
+		<property name="NumberOfPhysicalCPU" value="{$NumberOfPhysicalCPU}" />
+		<property name="TotalVirtualMemory" value="{$TotalVirtualMemory}" />
+		<property name="TotalPhysicalMemory" value="{$TotalPhysicalMemory}" />
+		<property name="LogicalProcessorsPerPhysical" value="{$LogicalProcessorsPerPhysical}" />
+		<property name="ProcessorClockFrequency" value="{$ProcessorClockFrequency}" />
+	    </properties>
+	    <xsl:apply-templates select="Testing/Test"/>
+
+	    <system-out>
+		BuildName: <xsl:value-of select="$BuildName" />
+		BuildStamp: <xsl:value-of select="$BuildStamp" />
+		Name: <xsl:value-of select="$Name" />
+		Generator: <xsl:value-of select="$Generator" />
+		CompilerName: <xsl:value-of select="$CompilerName" />
+		OSName: <xsl:value-of select="$OSName" />
+		Hostname: <xsl:value-of select="$Hostname" />
+		OSRelease: <xsl:value-of select="$OSRelease" />
+		OSVersion: <xsl:value-of select="$OSVersion" />
+		OSPlatform: <xsl:value-of select="$OSPlatform" />
+		Is64Bits: <xsl:value-of select="$Is64Bits" />
+		VendorString: <xsl:value-of select="$VendorString" />
+		VendorID: <xsl:value-of select="$VendorID" />
+		FamilyID: <xsl:value-of select="$FamilyID" />
+		ModelID: <xsl:value-of select="$ModelID" />
+		ProcessorCacheSize: <xsl:value-of select="$ProcessorCacheSize" />
+		NumberOfLogicalCPU: <xsl:value-of select="$NumberOfLogicalCPU" />
+		NumberOfPhysicalCPU: <xsl:value-of select="$NumberOfPhysicalCPU" />
+		TotalVirtualMemory: <xsl:value-of select="$TotalVirtualMemory" />
+		TotalPhysicalMemory: <xsl:value-of select="$TotalPhysicalMemory" />
+		LogicalProcessorsPerPhysical: <xsl:value-of select="$LogicalProcessorsPerPhysical" />
+		ProcessorClockFrequency: <xsl:value-of select="$ProcessorClockFrequency" />
+	    </system-out>
+	</testsuite>
+    </xsl:template>
+
+    <xsl:template match="Testing/Test">
+	<xsl:variable name="testcasename"><xsl:value-of select= "Name"/></xsl:variable>
+	<xsl:variable name="testclassname"><xsl:value-of select= " concat('this', substring(Path,2))"/></xsl:variable>
+	<xsl:variable name="exectime">
+	    <xsl:for-each select="Results/NamedMeasurement">
+		<xsl:if test="@name = 'Execution Time'">
+		    <xsl:value-of select="."/>
+		</xsl:if>
+	    </xsl:for-each>
+	</xsl:variable>
+
+	<testcase name="{$testcasename}" classname="{$testclassname}" time="{$exectime}">
+	    <xsl:if test="@Status = 'passed'">
+	    </xsl:if>
+	    <xsl:if test="@Status = 'failed'">
+		<xsl:variable name="failtype">
+		    <xsl:for-each select="Results/NamedMeasurement">
+			<xsl:if test="@name = 'Exit Code'">
+			    <xsl:value-of select="."/>
+			</xsl:if>
+		    </xsl:for-each>
+		</xsl:variable>
+		<xsl:variable name="failcode">
+		    <xsl:for-each select="Results/NamedMeasurement">
+			<xsl:if test="@name = 'Exit Value'">
+			    <xsl:value-of select="."/>
+			</xsl:if>
+		    </xsl:for-each>
+		</xsl:variable>
+		<failure message="{$failtype} ({$failcode})"><xsl:value-of select="Results/Measurement/Value/text()" /></failure>
+	    </xsl:if>
+	    <xsl:if test="@Status = 'notrun'">
+		<skipped><xsl:value-of select="Results/Measurement/Value/text()" /></skipped>
+	    </xsl:if>
+	</testcase>
+    </xsl:template>
+
+</xsl:stylesheet>
diff --git a/ci/build-tests.gitlab-ci.yml b/ci/build-tests.gitlab-ci.yml
new file mode 100644
index 0000000..2b69b28
--- /dev/null
+++ b/ci/build-tests.gitlab-ci.yml
@@ -0,0 +1,131 @@
+.build-tests-base:
+  stage: build
+  image: ubuntu:18.04
+  before_script:
+    - apt-get update -y
+    - apt-get install -y --no-install-recommends software-properties-common
+    - add-apt-repository -y  ppa:ubuntu-toolchain-r/test
+    - apt-get update
+    - apt-get install --no-install-recommends -y ${EIGEN_CI_CXX_COMPILER} ${EIGEN_CI_CC_COMPILER} cmake ninja-build
+  script:
+    - mkdir -p ${BUILDDIR} && cd ${BUILDDIR}
+    - echo "CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_SPLIT_TESTSUITE=${EIGEN_CI_TESTSUITE_SIZE} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} ${EIGEN_CI_ADDITIONAL_ARGS} .."
+    - CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_SPLIT_TESTSUITE=${EIGEN_CI_TESTSUITE_SIZE} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} ${EIGEN_CI_ADDITIONAL_ARGS}..
+    - echo "cmake --build . --target buildtestspart${EIGEN_CI_TESTSUITE_PART}"
+    - cmake --build . --target buildtestspart${EIGEN_CI_TESTSUITE_PART}
+  artifacts:
+    name: "$CI_JOB_NAME-$CI_COMMIT_REF_NAME"
+    paths:
+      - ${BUILDDIR}/
+    expire_in: 5 days
+
+# Base for all build jobs building the whole testsuite in one job. Note that
+# this cannot be run on GitLab's shared runners due to their timeout.
+.build-tests-single-base:
+  extends: .build-tests-base
+  script:
+    - mkdir -p ${BUILDDIR} && cd ${BUILDDIR}
+    - echo "CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} ${EIGEN_CI_CXX_FLAGS} ${EIGEN_CI_ADDITIONAL_ARGS}.."
+    - CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} ${EIGEN_CI_ADDITIONAL_ARGS}..
+    - echo "cmake --build . --target buildtests"
+    - cmake --build . --target buildtests
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+  only:
+    - schedules
+
+# Base for all build jobs using a splitted testsuite such that the job can be
+# run on GitLab's own shared runners
+.build-tests-split-base:
+  extends: .build-tests-base
+  script:
+    - mkdir -p ${BUILDDIR} && cd ${BUILDDIR}
+    - echo "CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_SPLIT_TESTSUITE=${EIGEN_CI_TESTSUITE_SIZE} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} ${EIGEN_CI_CXX_FLAGS} -DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On .."
+    - CXX=${EIGEN_CI_CXX_COMPILER} CC=${EIGEN_CI_CC_COMPILER} cmake -G ${EIGEN_CI_CMAKE_GENEATOR} -DEIGEN_SPLIT_TESTSUITE=${EIGEN_CI_TESTSUITE_SIZE} -DEIGEN_TEST_CXX11=${EIGEN_TEST_CXX11} -DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On ..
+    - echo "cmake --build . --target buildtestspart${EIGEN_CI_TESTSUITE_PART}"
+    - cmake --build . --target buildtestspart${EIGEN_CI_TESTSUITE_PART}
+  only:
+    - merge_requests
+
+########################## Nightly running jobs ################################
+
+# GCC 4.8
+# This is the oldest GCC version we support
+build-tests-g++-4.8-cxx11-on:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-4.8"
+    EIGEN_CI_CC_COMPILER: "gcc-4.8"
+    EIGEN_TEST_CXX11: "on"
+
+build-tests-g++-4.8-cxx11-off:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-4.8"
+    EIGEN_CI_CC_COMPILER: "gcc-4.8"
+    EIGEN_TEST_CXX11: "off"
+
+# Clang 10
+build-tests-clang++-10-cxx11-on:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "clang++-10"
+    EIGEN_CI_CC_COMPILER: "clang-10"
+    EIGEN_TEST_CXX11: "on"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+
+build-tests-clang++-10-cxx11-off:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "clang++-10"
+    EIGEN_CI_CC_COMPILER: "clang-10"
+    EIGEN_TEST_CXX11: "off"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+
+# GCC 10
+build-tests-g++-10-cxx11-off:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-10"
+    EIGEN_CI_CC_COMPILER: "gcc-10"
+    EIGEN_TEST_CXX11: "off"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+
+build-tests-g++-10-cxx11-on:
+  extends: .build-tests-single-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-10"
+    EIGEN_CI_CC_COMPILER: "gcc-10"
+    EIGEN_TEST_CXX11: "on"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+
+########################### Merge request jobs #################################
+
+# GCC 10
+build-tests-g++-9-cxx11-on-mr:
+  only:
+    - merge_requests
+  extends: .build-tests-split-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-9"
+    EIGEN_CI_CC_COMPILER: "gcc-9"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+  parallel:
+    matrix:
+      - EIGEN_CI_TESTSUITE_PART: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+        EIGEN_TEST_CXX11: "on"
+
+build-tests-g++-9-cxx11-off-mr:
+  only:
+    - merge_requests
+  extends: .build-tests-split-base
+  variables:
+    EIGEN_CI_CXX_COMPILER: "g++-9"
+    EIGEN_CI_CC_COMPILER: "gcc-9"
+    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX=On -DEIGEN_TEST_AVX2=On"
+  parallel:
+    matrix:
+      - EIGEN_CI_TESTSUITE_PART: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+        EIGEN_TEST_CXX11: "off"
diff --git a/ci/run-tests.gitlab-ci.yml b/ci/run-tests.gitlab-ci.yml
new file mode 100644
index 0000000..c8ad66e
--- /dev/null
+++ b/ci/run-tests.gitlab-ci.yml
@@ -0,0 +1,128 @@
+.run_tests:
+  allow_failure: true
+  stage: test
+  image: ubuntu:18.04
+  before_script:
+    - apt-get update -y
+    - apt-get install -y --no-install-recommends software-properties-common
+    - add-apt-repository -y  ppa:ubuntu-toolchain-r/test
+    - apt-get update
+    - apt-get install --no-install-recommends -y ${EIGEN_CI_CXX_COMPILER} ${EIGEN_CI_CC_COMPILER} cmake ninja-build xsltproc
+  script:
+    - echo "cd ${BUILDDIR} && ctest --output-on-failure --no-compress-output --build-no-clean -T test"
+    - cd ${BUILDDIR} && ctest --output-on-failure --no-compress-output --build-no-clean -T test
+  after_script:
+    - apt-get update -y
+    - apt-get install --no-install-recommends -y xsltproc
+    - cd ${BUILDDIR}
+    - xsltproc ../ci/CTest2JUnit.xsl Testing/`head -n 1 < Testing/TAG`/Test.xml > "JUnitTestResults_$CI_JOB_ID.xml"
+  artifacts:
+    reports:
+      junit:
+        - ${BUILDDIR}/JUnitTestResults_$CI_JOB_ID.xml
+    expire_in: 5 days
+
+########################## Nightly running jobs ################################
+# GCC 4.8
+run-tests-g++-4.8-cxx11-on:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-4.8
+    EIGEN_CI_CC_COMPILER: gcc-4.8
+  needs: [ "build-tests-g++-4.8-cxx11-on" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+run-tests-g++-4.8-cxx11-off:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-4.8
+    EIGEN_CI_CC_COMPILER: gcc-4.8
+  needs: [ "build-tests-g++-4.8-cxx11-off" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+# Clang 10
+run-tests-clang++-10-cxx11-on:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: clang++-10
+    EIGEN_CI_CC_COMPILER: clang-10
+  needs: [ "build-tests-clang++-10-cxx11-on" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+run-tests-clang++-10-cxx11-off:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: clang++-10
+    EIGEN_CI_CC_COMPILER: clang-10
+  needs: [ "build-tests-clang++-10-cxx11-off" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+# GCC 10
+run-tests-g++-10-cxx11-on:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-10
+    EIGEN_CI_CC_COMPILER: gcc-10
+  needs: [ "build-tests-g++-10-cxx11-on" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+run-tests-g++-10-cxx11-off:
+  only:
+    - schedules
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-10
+    EIGEN_CI_CC_COMPILER: gcc-10
+  needs: [ "build-tests-g++-10-cxx11-off" ]
+  tags:
+    - eigen-runner
+    - x86
+    - linux
+
+########################### Merge request jobs #################################
+
+# GCC 10
+run-tests-g++-9-cxx11-on-mr:
+  only:
+    - merge_requests
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-9
+    EIGEN_CI_CC_COMPILER: gcc-9
+  dependencies:
+    - build-tests-g++-9-cxx11-on-mr
+
+run-tests-g++-9-cxx11-off-mr:
+  only:
+    - merge_requests
+  extends: .run_tests
+  variables:
+    EIGEN_CI_CXX_COMPILER: g++-9
+    EIGEN_CI_CC_COMPILER: gcc-9
+  dependencies:
+    - build-tests-g++-9-cxx11-off-mr
diff --git a/cmake/EigenTesting.cmake b/cmake/EigenTesting.cmake
index c98393e..fae5bc1 100644
--- a/cmake/EigenTesting.cmake
+++ b/cmake/EigenTesting.cmake
@@ -648,3 +648,63 @@
   ei_test1_get_compilerver_from_cxx_version_string("g++-mp-4.4 (GCC) 4.4.6" "g++" "4.4.6")
   ei_test1_get_compilerver_from_cxx_version_string("g++-mp-4.4 (GCC) 2011" "g++" "4.4")
 endmacro()
+
+# Split all tests listed in EIGEN_TESTS_LIST into num_splits many targets
+# named buildtestspartN with N = { 0, ..., num_splits-1}.
+#
+# The intention behind the existance of this macro is the size of Eigen's
+# testsuite. Together with the relativly big compile-times building all tests
+# can take a substantial amount of time depending on the available hardware.
+# 
+# The last buildtestspartN target will build possible remaining tests.
+#
+# An example:
+#
+#   EIGEN_TESTS_LIST= [ test1, test2, test3, test4, test5, test6, test7 ]
+#
+# A call to ei_split_testsuite(3) creates the following targets with dependencies
+#
+#   Target                      Dependencies
+#   ------                      ------------
+#   buildtestspart0             test1, test2
+#   buildtestspart1             test3, test4
+#   buildtestspart2             test5, test6, test7
+#
+macro(ei_split_testsuite num_splits)
+  get_property(EIGEN_TESTS_LIST GLOBAL PROPERTY EIGEN_TESTS_LIST)
+
+  # Translate EIGEN_TESTS_LIST into a CMake list
+  string(REGEX REPLACE "\n" " " EIGEN_TESTS_LIST "${EIGEN_TESTS_LIST}")
+  set(EIGEN_TESTS_LIST "${EIGEN_TESTS_LIST}")
+  separate_arguments(EIGEN_TESTS_LIST)
+
+  set(eigen_test_count "0")
+  foreach(t IN ITEMS ${EIGEN_TESTS_LIST})
+    math(EXPR eigen_test_count "${eigen_test_count}+1")
+  endforeach()
+
+  # Get number of tests per target
+  math(EXPR num_tests_per_target "${eigen_test_count}/${num_splits} - ${eigen_test_count}/${num_splits} % 1")
+
+  set(test_idx "0")
+  math(EXPR target_bound "${num_splits}-1")
+  foreach(part RANGE "0" "${target_bound}")
+    # Create target
+    set(current_target "buildtestspart${part}")
+    add_custom_target("${current_target}")
+    math(EXPR upper_bound "${test_idx} + ${num_tests_per_target} - 1")
+    foreach(test_idx RANGE "${test_idx}" "${upper_bound}")
+      list(GET EIGEN_TESTS_LIST "${test_idx}" curr_test)
+      add_dependencies("${current_target}" "${curr_test}")
+    endforeach()
+    math(EXPR test_idx "${test_idx} + ${num_tests_per_target}")
+  endforeach()
+  
+  # Handle the possibly remaining tests
+  math(EXPR test_idx "${num_splits} * ${num_tests_per_target}")
+  math(EXPR target_bound "${eigen_test_count} - 1")
+  foreach(test_idx RANGE "${test_idx}" "${target_bound}")
+    list(GET EIGEN_TESTS_LIST "${test_idx}" curr_test)
+    add_dependencies("${current_target}" "${curr_test}")
+  endforeach()
+endmacro(ei_split_testsuite num_splits)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6b2f482..013ad6c 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -443,16 +443,11 @@
 	message(FATAL_ERROR "HIP_PLATFORM = nvcc is not supported within Eigen")
       else ()
 	message(FATAL_ERROR "Unknown HIP_PLATFORM = ${HIP_PLATFORM}")
-      endif()
-      
+      endif() 
     endif()
-    
   else ()
-
     message(FATAL_ERROR "EIGEN_TEST_HIP is ON, but the specified HIP_PATH (${HIP_PATH}) does not exist")
-    
   endif()
-    
 endif()
 
 option(EIGEN_TEST_BUILD_DOCUMENTATION "Test building the doxygen documentation" OFF)