Remove the build requirement for an unused C++ compiler

This patch sets the programming languages of each CMake project to C. With this
change, CMake does not search for an unused C++ compiler anymore.

10 files changed, 18 insertions, 11 deletions

diff --git a/README.md b/README.md
index 89fa346..1552091 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,6 @@ apt-get install git \
                 make \
                 cmake \
                 gcc \
-                g++ \
                 linux-headers-generic \
                 libcap-dev \
                 libncurses-dev \
@@ -52,7 +51,6 @@ yum install git \
             make \
             cmake \
             gcc \
-            gcc-c++ \
             kernel-devel \
             elfutils-libelf-devel \
             libcap-devel \
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 646a53f..7b88af3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-src)
+project(xloop-src
+        LANGUAGES C)
 
 add_subdirectory(kernel)
 add_subdirectory(utils)
diff --git a/src/kernel/CMakeLists.txt b/src/kernel/CMakeLists.txt
index 2f1446a..3dcc8a2 100644
--- a/src/kernel/CMakeLists.txt
+++ b/src/kernel/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-kernel)
+project(xloop-kernel-modules
+        LANGUAGES C)
 
 # include macros to define Linux kernel build targets
 include(Kernel)
diff --git a/src/kernel/tests/CMakeLists.txt b/src/kernel/tests/CMakeLists.txt
index 201abcb..cf274ef 100644
--- a/src/kernel/tests/CMakeLists.txt
+++ b/src/kernel/tests/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(xloop-kernel-test)
+project(xloop-kernel-test
+        LANGUAGES C)
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include/old)
diff --git a/src/kernel/tests/lib/CMakeLists.txt b/src/kernel/tests/lib/CMakeLists.txt
index 5b3f421..fafdd38 100644
--- a/src/kernel/tests/lib/CMakeLists.txt
+++ b/src/kernel/tests/lib/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(xloop-kernel-test-lib)
+project(xloop-kernel-test-lib
+        LANGUAGES C)
 
 add_library(libltp STATIC ${CMAKE_CURRENT_SOURCE_DIR}/cloner.c
                           ${CMAKE_CURRENT_SOURCE_DIR}/get_path.c
diff --git a/src/kernel/tests/testcases/kernel/syscalls/ioctl/CMakeLists.txt b/src/kernel/tests/testcases/kernel/syscalls/ioctl/CMakeLists.txt
index f503838..c6156f6 100644
--- a/src/kernel/tests/testcases/kernel/syscalls/ioctl/CMakeLists.txt
+++ b/src/kernel/tests/testcases/kernel/syscalls/ioctl/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(xloop-kernel-test-ioctl_xloop)
+project(xloop-kernel-test-ioctl_xloop
+        LANGUAGES C)
 
 # test ioctl_xloop01
 add_executable(ioctl_xloop01 ${CMAKE_CURRENT_SOURCE_DIR}/ioctl_xloop01.c)
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index f3ea912..e791a40 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-utils)
+project(xloop-utils
+        LANGUAGES C)
 
 # include global headers
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)
diff --git a/src/utils/lib/CMakeLists.txt b/src/utils/lib/CMakeLists.txt
index 22eafb3..ac70039 100644
--- a/src/utils/lib/CMakeLists.txt
+++ b/src/utils/lib/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-utils-lib)
+project(xloop-utils-lib
+        LANGUAGES C)
 
 add_library(libcommon STATIC ${CMAKE_CURRENT_SOURCE_DIR}/blkdev.c
                              ${CMAKE_CURRENT_SOURCE_DIR}/canonicalize.c
diff --git a/src/utils/libsmartcols/CMakeLists.txt b/src/utils/libsmartcols/CMakeLists.txt
index dccb5e2..307f06d 100644
--- a/src/utils/libsmartcols/CMakeLists.txt
+++ b/src/utils/libsmartcols/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-utils-libsmartcols)
+project(xloop-utils-libsmartcols
+        LANGUAGES C)
 
 add_library(libsmartcols STATIC ${CMAKE_CURRENT_SOURCE_DIR}/src/buffer.c
                                 ${CMAKE_CURRENT_SOURCE_DIR}/src/calculate.c
diff --git a/src/utils/sys-utils/CMakeLists.txt b/src/utils/sys-utils/CMakeLists.txt
index e05b5cf..56bc69c 100644
--- a/src/utils/sys-utils/CMakeLists.txt
+++ b/src/utils/sys-utils/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.10)
 
 # set the project name
-project(xloop-utils-sys-utils)
+project(xloop-utils-sys-utils
+        LANGUAGES C)
 
 # add xlosetup executable
 add_executable(xlosetup ${CMAKE_CURRENT_SOURCE_DIR}/xlosetup.c)