2020-08-26 18:59:05 +08:00
|
|
|
# Building curl with Visual C++
|
|
|
|
|
|
|
|
This document describes how to compile, build and install curl and libcurl
|
|
|
|
from sources using the Visual C++ build tool. To build with VC++, you will of
|
|
|
|
course have to first install VC++. The minimum required version of VC is 6
|
|
|
|
(part of Visual Studio 6). However using a more recent version is strongly
|
|
|
|
recommended.
|
|
|
|
|
|
|
|
VC++ is also part of the Windows Platform SDK. You do not have to install the
|
|
|
|
full Visual Studio or Visual C++ if all you want is to build curl.
|
|
|
|
|
|
|
|
The latest Platform SDK can be downloaded freely from [Windows SDK and
|
|
|
|
emulator
|
|
|
|
archive](https://developer.microsoft.com/en-us/windows/downloads/sdk-archive)
|
|
|
|
|
|
|
|
## Prerequisites
|
|
|
|
|
|
|
|
If you wish to support zlib, openssl, c-ares, ssh2, you will have to download
|
|
|
|
them separately and copy them to the deps directory as shown below:
|
|
|
|
|
|
|
|
somedirectory\
|
|
|
|
|_curl-src
|
|
|
|
| |_winbuild
|
|
|
|
|
|
|
|
|
|_deps
|
|
|
|
|_ lib
|
|
|
|
|_ include
|
|
|
|
|_ bin
|
|
|
|
|
|
|
|
It is also possible to create the deps directory in some other random places
|
|
|
|
and tell the Makefile its location using the WITH_DEVEL option.
|
|
|
|
|
|
|
|
## Building straight from git
|
|
|
|
|
|
|
|
When you check out code git and build it, as opposed from a released source
|
|
|
|
code archive, you need to first run the `buildconf.bat` batch file (present
|
|
|
|
in the source code root directory) to set things up.
|
|
|
|
|
|
|
|
## Open a command prompt
|
|
|
|
|
|
|
|
Open a Visual Studio Command prompt:
|
|
|
|
|
|
|
|
Using the **'Developer Command Prompt for VS [version]'** menu entry: where
|
|
|
|
[version} is the Visual Studio version. The developer prompt at default uses
|
|
|
|
the x86 mode. It is required to call `Vcvarsall.bat` to setup the prompt for
|
|
|
|
the machine type you want. This type of command prompt may not exist in all
|
|
|
|
Visual Studio versions.
|
|
|
|
|
|
|
|
See also: [Developer Command Prompt for Visual
|
|
|
|
Studio](https://docs.microsoft.com/en-us/dotnet/framework/tools/developer-command-prompt-for-vs)
|
|
|
|
and [How to: Enable a 64-Bit, x64 hosted MSVC toolset on the command
|
|
|
|
line](https://docs.microsoft.com/en-us/cpp/build/how-to-enable-a-64-bit-visual-cpp-toolset-on-the-command-line)
|
|
|
|
|
|
|
|
Using the **'VS [version] [platform] [type] Command Prompt'** menu entry:
|
|
|
|
where [version] is the Visual Studio version, [platform] is e.g. x64 and
|
|
|
|
[type] Native of Cross platform build. This type of command prompt may not
|
|
|
|
exist in all Visual Studio versions.
|
|
|
|
|
2022-03-15 23:19:10 +08:00
|
|
|
See also: [Set the Path and Environment Variables for Command-Line Builds](https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line)
|
2020-08-26 18:59:05 +08:00
|
|
|
|
|
|
|
## Build in the console
|
|
|
|
|
|
|
|
Once you are in the console, go to the winbuild directory in the Curl
|
|
|
|
sources:
|
|
|
|
|
|
|
|
cd curl-src\winbuild
|
|
|
|
|
|
|
|
Then you can call `nmake /f Makefile.vc` with the desired options (see
|
|
|
|
below). The builds will be in the top src directory, `builds\` directory, in
|
|
|
|
a directory named using the options given to the nmake call.
|
|
|
|
|
|
|
|
nmake /f Makefile.vc mode=<static or dll> <options>
|
|
|
|
|
2020-08-26 21:55:40 +08:00
|
|
|
where `<options>` is one or many of:
|
2020-08-26 18:59:05 +08:00
|
|
|
|
2021-06-14 21:34:40 +08:00
|
|
|
- `VC=<num>` - VC version. 6 or later.
|
2020-08-26 18:59:05 +08:00
|
|
|
- `WITH_DEVEL=<path>` - Paths for the development files (SSL, zlib, etc.)
|
|
|
|
Defaults to sibbling directory deps: ../deps
|
|
|
|
Libraries can be fetched at https://windows.php.net/downloads/php-sdk/deps/
|
|
|
|
Uncompress them into the deps folder.
|
|
|
|
- `WITH_SSL=<dll/static>` - Enable OpenSSL support, DLL or static
|
|
|
|
- `WITH_NGHTTP2=<dll/static>` - Enable HTTP/2 support, DLL or static
|
2022-04-11 00:21:37 +08:00
|
|
|
- `WITH_MSH3=<dll/static>` - Enable (experimental) HTTP/3 support, DLL or static
|
2020-08-26 18:59:05 +08:00
|
|
|
- `WITH_MBEDTLS=<dll/static>` - Enable mbedTLS support, DLL or static
|
|
|
|
- `WITH_CARES=<dll/static>` - Enable c-ares support, DLL or static
|
|
|
|
- `WITH_ZLIB=<dll/static>` - Enable zlib support, DLL or static
|
2022-02-26 02:07:00 +08:00
|
|
|
- `WITH_SSH=<dll/static>` - Enable libSSH support, DLL or static
|
2020-08-26 18:59:05 +08:00
|
|
|
- `WITH_SSH2=<dll/static>` - Enable libSSH2 support, DLL or static
|
|
|
|
- `WITH_PREFIX=<dir>` - Where to install the build
|
|
|
|
- `ENABLE_SSPI=<yes/no>` - Enable SSPI support, defaults to yes
|
|
|
|
- `ENABLE_IPV6=<yes/no>` - Enable IPv6, defaults to yes
|
|
|
|
- `ENABLE_IDN=<yes or no>` - Enable use of Windows IDN APIs, defaults to yes
|
|
|
|
Requires Windows Vista or later
|
2020-11-20 06:20:18 +08:00
|
|
|
- `ENABLE_SCHANNEL=<yes/no>` - Enable native Windows SSL support, defaults
|
|
|
|
to yes if SSPI and no other SSL library
|
|
|
|
- `ENABLE_OPENSSL_AUTO_LOAD_CONFIG=<yes/no>`
|
|
|
|
- Enable loading OpenSSL configuration
|
|
|
|
automatically, defaults to yes
|
|
|
|
- `ENABLE_UNICODE=<yes/no>` - Enable UNICODE support, defaults to no
|
2021-08-10 01:00:52 +08:00
|
|
|
- `GEN_PDB=<yes/no>` - Generate External Program Database
|
|
|
|
(debug symbols for release build)
|
2020-08-26 18:59:05 +08:00
|
|
|
- `DEBUG=<yes/no>` - Debug builds
|
|
|
|
- `MACHINE=<x86/x64>` - Target architecture (default is x86)
|
|
|
|
- `CARES_PATH=<path>` - Custom path for c-ares
|
|
|
|
- `MBEDTLS_PATH=<path>` - Custom path for mbedTLS
|
|
|
|
- `NGHTTP2_PATH=<path>` - Custom path for nghttp2
|
2022-04-11 00:21:37 +08:00
|
|
|
- `MSH3_PATH=<path>` - Custom path for msh3
|
2020-08-26 18:59:05 +08:00
|
|
|
- `SSH2_PATH=<path>` - Custom path for libSSH2
|
|
|
|
- `SSL_PATH=<path>` - Custom path for OpenSSL
|
|
|
|
- `ZLIB_PATH=<path>` - Custom path for zlib
|
|
|
|
|
|
|
|
## Static linking of Microsoft's C RunTime (CRT):
|
|
|
|
|
|
|
|
If you are using mode=static nmake will create and link to the static build
|
|
|
|
of libcurl but *not* the static CRT. If you must you can force nmake to link
|
|
|
|
in the static CRT by passing RTLIBCFG=static. Typically you shouldn't use
|
|
|
|
that option, and nmake will default to the DLL CRT. RTLIBCFG is rarely used
|
|
|
|
and therefore rarely tested. When passing RTLIBCFG for a configuration that
|
|
|
|
was already built but not with that option, or if the option was specified
|
|
|
|
differently, you must destroy the build directory containing the
|
|
|
|
configuration so that nmake can build it from scratch.
|
|
|
|
|
2022-03-14 06:45:39 +08:00
|
|
|
This option is not recommended unless you have enough development experience
|
|
|
|
to know how to match the runtime library for linking (that is, the CRT).
|
|
|
|
If RTLIBCFG=static then release builds use /MT and debug builds use /MTd.
|
|
|
|
|
|
|
|
## Building your own application with libcurl (Visual Studio example)
|
|
|
|
|
|
|
|
When you build curl and libcurl, nmake will show the relative path where the
|
|
|
|
output directory is. The output directory is named from the options nmake used
|
|
|
|
when building. You may also see temp directories of the same name but with
|
|
|
|
suffixes -obj-curl and -obj-lib.
|
|
|
|
|
|
|
|
For example let's say you've built curl.exe and libcurl.dll from the Visual
|
|
|
|
Studio 2010 x64 Win64 Command Prompt:
|
|
|
|
|
|
|
|
nmake /f Makefile.vc mode=dll VC=10
|
|
|
|
|
|
|
|
The output directory will have a name similar to
|
|
|
|
..\builds\libcurl-vc10-x64-release-dll-ipv6-sspi-schannel.
|
|
|
|
|
|
|
|
The output directory contains subdirectories bin, lib and include. Those are
|
|
|
|
the directories to set in your Visual Studio project. You can either copy the
|
|
|
|
output directory to your project or leave it in place. Following the example,
|
|
|
|
let's assume you leave it in place and your curl top source directory is
|
|
|
|
C:\curl-7.82.0. You would set these options for configurations using the x64
|
|
|
|
platform:
|
|
|
|
|
|
|
|
~~~
|
|
|
|
- Configuration Properties > Debugging > Environment
|
|
|
|
PATH=C:\curl-7.82.0\builds\libcurl-vc10-x64-release-dll-ipv6-sspi-schannel\bin;%PATH%
|
|
|
|
|
|
|
|
- C/C++ > General > Additional Include Directories
|
|
|
|
C:\curl-7.82.0\builds\libcurl-vc10-x64-release-dll-ipv6-sspi-schannel\include;
|
|
|
|
|
|
|
|
- Linker > General > Additional Library Directories
|
|
|
|
C:\curl-7.82.0\builds\libcurl-vc10-x64-release-dll-ipv6-sspi-schannel\lib;
|
|
|
|
|
|
|
|
- Linker > Input > Additional Dependencies
|
|
|
|
libcurl.lib;
|
|
|
|
~~~
|
|
|
|
|
|
|
|
For configurations using the x86 platform (aka Win32 platform) you would
|
|
|
|
need to make a separate x86 build of libcurl.
|
|
|
|
|
|
|
|
If you build libcurl static (mode=static) or debug (DEBUG=yes) then the
|
|
|
|
library name will vary and separate builds may be necessary for separate
|
|
|
|
configurations of your project within the same platform. This is discussed
|
|
|
|
in the next section.
|
|
|
|
|
2020-08-26 18:59:05 +08:00
|
|
|
## Building your own application with a static libcurl
|
|
|
|
|
|
|
|
When building an application that uses the static libcurl library on Windows,
|
|
|
|
you must define CURL_STATICLIB. Otherwise the linker will look for dynamic
|
|
|
|
import symbols.
|
|
|
|
|
2022-03-14 06:45:39 +08:00
|
|
|
The static library name has an '_a' suffix in the basename and the debug
|
|
|
|
library name has a '_debug' suffix in the basename. For example,
|
|
|
|
libcurl_a_debug.lib is a static debug build of libcurl.
|
|
|
|
|
|
|
|
You may need a separate build of libcurl for each VC configuration combination
|
|
|
|
(eg: Debug|Win32, Debug|x64, Release|Win32, Release|x64).
|
|
|
|
|
|
|
|
You must specify any additional dependencies needed by your build of static
|
|
|
|
libcurl (eg: advapi32.lib;crypt32.lib;normaliz.lib;ws2_32.lib;wldap32.lib).
|
|
|
|
|
2020-08-26 18:59:05 +08:00
|
|
|
## Legacy Windows and SSL
|
|
|
|
|
|
|
|
When you build curl using the build files in this directory the default SSL
|
|
|
|
backend will be Schannel (Windows SSPI), the native SSL library that comes
|
|
|
|
with the Windows OS. Schannel in Windows <= XP is not able to connect to
|
|
|
|
servers that no longer support the legacy handshakes and algorithms used by
|
|
|
|
those versions. If you will be using curl in one of those earlier versions of
|
|
|
|
Windows you should choose another SSL backend like OpenSSL.
|