Fix build failure on GCC 7. (#122)

* Fix build failure on GCC 7.

Fixes https://github.com/microsoft/vcpkg/issues/19022

* Fix job name.

azure-pipelines/pipelines.yml

@@ -27,6 +27,32 @@ jobs:
         arguments: '-Triplet x64-linux -WorkingRoot work -VcpkgRoot $(VCPKG_ROOT)'
         workingDirectory: '$(Build.SourcesDirectory)/build.amd64.debug'
         pwsh: true
+- job: linux_gcc_7
+  displayName: 'Ubuntu 18.04 with GCC 7'
+  pool:
+    vmImage: 'ubuntu-18.04'
+  variables:
+    - name: 'VCPKG_ROOT'
+      value: $(Build.SourcesDirectory)/vcpkg-root
+  steps:
+    - bash: |
+        git clone https://github.com/microsoft/vcpkg "$VCPKG_ROOT" -n
+        git -C "$VCPKG_ROOT" checkout $VCPKG_REPO_COMMIT_SHA
+      displayName: "Clone vcpkg repo to serve as root"
+    - bash: |
+        cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTING=ON -DVCPKG_DEVELOPMENT_WARNINGS=ON -DVCPKG_WARNINGS_AS_ERRORS=ON -DVCPKG_BUILD_FUZZING=ON -DCMAKE_CXX_COMPILER=g++-7 -B build.amd64.debug
+        make -j 2 -C build.amd64.debug
+      displayName: "Build vcpkg with CMake"
+      failOnStderr: true
+    - bash: build.amd64.debug/vcpkg-test
+      displayName: 'Run vcpkg tests'
+    - task: PowerShell@2
+      displayName: 'Run vcpkg end-to-end tests'
+      inputs:
+        filePath: 'azure-pipelines/end-to-end-tests.ps1'
+        arguments: '-Triplet x64-linux -WorkingRoot work -VcpkgRoot $(VCPKG_ROOT)'
+        workingDirectory: '$(Build.SourcesDirectory)/build.amd64.debug'
+        pwsh: true
 - job: osx
   displayName: 'OSX'
   pool:

src/vcpkg/base/files.cpp

@@ -1362,7 +1362,7 @@ namespace vcpkg
 #else // ^^^ defined(_WIN32) / !defined(_WIN32) vvv
             if (target.is_absolute())
             {
-                return path;
+                return target;
             }
             else
             {