I tried to compile mono on Debian 9.3 using commands
apt-get install git autoconf libtool automake build-essential gettext cmake python
cd /usr/local/src
wget https://github.com/mono/mono/archive/mono-5.18.1.0.tar.gz
tar -xvf mono-5.18.1.0.tar.gz
cd mono-mono-5.18.1.0
./autogen.sh --prefix=/opt/m518
./configure --prefix=/opt/m518
make
but make throws strange error
...
make[3]: Entering directory '/usr/local/src/mono-mono-5.18.1.0/mono/btls'
mkdir -p build-shared
(cd build-shared && CC="gcc" CXX="g++" /usr/bin/cmake -D CMAKE_MAKE_PROGRAM=/usr/bin/make -D CMAKE_INSTALL_PREFIX:PATH=/opt/m518 -D BTLS_ROOT:PATH=/usr/local/src/mono-mono-5.18.1.0/external/boringssl -D SRC_DIR:PATH=/usr/local/src/mono-mono-5.18.1.0/mono/btls -D BTLS_CFLAGS:STRING="" -DBTLS_ARCH="x86_64" -DBUILD_SHARED_LIBS=1 /usr/local/src/mono-mono-5.18.1.0/mono/btls)
CMake Warning at CMakeLists.txt:27 (message):
SET ARCH: x86_64
CMake Error at CMakeLists.txt:48 (add_subdirectory):
The source directory
/usr/local/src/mono-mono-5.18.1.0/external/boringssl
does not contain a CMakeLists.txt file.
-- Configuring incomplete, errors occurred!
See also "/usr/local/src/mono-mono-5.18.1.0/mono/btls/build-shared/CMakeFiles/CMakeOutput.log".
Makefile:607: recipe for target 'build-shared/Makefile' failed
make[3]: *** [build-shared/Makefile] Error 1
How to fix this so that mono can compiled ?
/usr/local/src/mono-mono-5.18.1.0/external/boringssl directory is empty.
Update
I compiled Mono as described in answer. MVC Application does not start. Apache errorlog contains error that string.split is not found (full erroe below). How to fix this so that application can run.
[Fri Mar 29 23:26:57.643727 2019] [mpm_event:notice] [pid 28163:tid 140067959029824] AH00489: Apache/2.4.25 (Debian) mod_mono/3.12 configured -- resuming normal operations
[Fri Mar 29 23:26:57.643846 2019] [core:notice] [pid 28163:tid 140067959029824] AH00094: Command line: '/usr/sbin/apache2'
[ERROR] FATAL UNHANDLED EXCEPTION: System.Configuration.ConfigurationErrorsException: Error Initializing the configuration system. ---> System.MissingMethodException: Method 'string.Split' not found.
at System.Configuration.SectionGroupInfo.ReadRootData (System.Xml.XmlReader reader, System.Configuration.Configuration config, System.Boolean overrideAllowed) [0x00007] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/SectionGroupInfo.cs:273
at System.Configuration.Configuration.ReadConfigFile (System.Xml.XmlReader reader, System.String fileName) [0x000ce] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/Configuration.cs:572
at System.Configuration.Configuration.Load () [0x00043] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/Configuration.cs:532
at System.Configuration.Configuration.Init (System.Configuration.Internal.IConfigSystem system, System.String configPath, System.Configuration.Configuration parent) [0x0005d] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/Configuration.cs:138
at System.Configuration.Configuration..ctor (System.Configuration.InternalConfigurationSystem system, System.String locationSubPath) [0x00056] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/Configuration.cs:96
at System.Configuration.Configuration..ctor (System.Configuration.InternalConfigurationSystem system, System.String locationSubPath) [0x00038] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/Configuration.cs:91
at System.Configuration.InternalConfigurationFactory.Create (System.Type typeConfigHost, System.Object[] hostInitConfigurationParams) [0x0000d] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/InternalConfigurationFactory.cs:41
at System.Configuration.ConfigurationManager.OpenExeConfigurationInternal (System.Configuration.ConfigurationUserLevel userLevel, System.Reflection.Assembly calling_assembly, System.String exePath) [0x000ea] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ConfigurationManager.cs:119
at System.Configuration.ClientConfigurationSystem.get_Configuration () [0x0000e] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ClientConfigurationSystem.cs:49
--- End of inner exception stack trace ---
at System.Configuration.ClientConfigurationSystem.get_Configuration () [0x0001f] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ClientConfigurationSystem.cs:52
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection (System.String configKey) [0x00000] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ClientConfigurationSystem.cs:61
at System.Configuration.ConfigurationManager.GetSection (System.String sectionName) [0x00000] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ConfigurationManager.cs:159
at System.Configuration.ConfigurationManager.get_AppSettings () [0x00000] in /usr/local/src/mono/mcs/class/System.Configuration/System.Configuration/ConfigurationManager.cs:173
at Mono.WebServer.Options.Settings.Setting`1[T]..ctor (System.String name, Mono.WebServer.Options.Settings.Parser`1[T] parser, System.String description, System.String appSetting, System.String environment, System.Nullable`1[T] defaultValue, System.String prototype) [0x000c5] in /usr/local/src/xsp-4.6/src/Mono.WebServer/Options/Settings/Setting.cs:55
at Mono.WebServer.Options.Settings.NullableSetting`1[T]..ctor (System.String name, Mono.WebServer.Options.Settings.Parser`1[T] parser, System.String description, System.String appSetting, System.String environment, System.Nullable`1[T] defaultValue, System.String prototype) [0x00003] in /usr/local/src/xsp-4.6/src/Mono.WebServer/Options/Settings/NullableSetting.cs:33
at Mono.WebServer.Options.Settings.NullableUInt16Setting..ctor (System.String name, System.String description, System.String appSetting, System.String environment, System.Nullable`1[T] defaultValue, System.String prototype) [0x00000] in /usr/local/src/xsp-4.6/src/Mono.WebServer/Options/Settings/NullableUInt16Setting.cs:35
at Mono.WebServer.Apache.ConfigurationManager..ctor (System.String name, System.Boolean quietDefault, System.String rootDefault) [0x0009c] in /usr/local/src/xsp-4.6/src/Mono.WebServer.Apache/ConfigurationManager.cs:43
at Mono.WebServer.Apache.Server.RealMain (System.String[] args, System.Boolean root, Mono.WebServer.IApplicationHost ext_apphost, System.Boolean v_quiet) [0x0001a] in /usr/local/src/xsp-4.6/src/Mono.WebServer.Apache/main.cs:77
at (wrapper remoting-invoke-with-check) Mono.WebServer.Apache.Server:RealMain (string[],bool,Mono.WebServer.IApplicationHost,bool)
at Mono.WebServer.Apache.Server.Main (System.String[] args) [0x00034] in /usr/local/src/xsp-4.6/src/Mono.WebServer.Apache/main.cs:58
Shallow clone the specific branch/tag that you need:
git clone --recursive https://github.com/mono/mono.git --branch=mono-5.18.1.0
cd mono
make install
re: What is git tag, How to create tags & How to checkout git remote tag(s)