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build_curl.md

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Building cURL extension for Windows XP

In this text, xXX means x86 or x64 depending on the required build version.

Set up compiler

Requirements

To compile:

  • Visual C++ 11.0 (Visual Studio 2012 SP1+)

Set up

Install Visual Studio 2012 with at least SP1.

Command prompt

Open the VS2012 xXX Native Tools Command Prompt.

Download prerequisites/sources

  • Get CURL sources: curl-7.50.3.zip
  • Get patch for CURL: curl-7.50.3.patch

Set up the build directory

  • Unpack the CURL sources archive into directory: c:\php-sdk\extensions\

Patch source code

Now CURL sources need to be patched to support Windows XP. You can either apply a provided patch file or go over all changes manually.

Option 1: apply patch

  1. Copy CURL patch extensions\curl-7.50.3.patch to extensions\
  2. Get patch.exe utility from downloads\ or from UnxUtils
  3. Open the command prompt and switch to working directory: cd c:\php-sdk\extensions
  4. Apply the patch: patch.exe -p0 -u <curl-7.50.3.patch

Notes about patch.exe:

  • If running patch.exe brings up UAC prompt - try renaming the program, for example to p.exe.
  • If you get a runtime error as below - it may be due to your .patch file using non-Windows line endings. Open it in a text editor such as Notepad 2e, convert line endings to CR/LF, save and re-run patch.
patching file ...
Assertion failed: hunk, file ..., line ...

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Option 2: manual patching

Set up nmake using v110_xp toolset in file C:\php-sdk\extensions\curl-7.50.3\winbuild\MakefileBuild.vc:

  1. Add D_USING_V110_SDK71_ directive:
CC_NODEBUG  = $(CC) /O2 /DNDEBUG /D_USING_V110_SDK71_
CFLAGS     = /I. /I../lib /I../include /nologo /W3 /GX /DWIN32 /YX /FD /c /DBUILDING_LIBCURL /D_USING_V110_SDK71_
CURL_CFLAGS   =  /I../lib /I../include /nologo /W3 /EHsc /DWIN32 /FD /c /D_USING_V110_SDK71_
  1. Adjust subsystem directive:
!IF "$(MACHINE)"=="x64"
CURL_LFLAGS   = /nologo /out:$(DIRDIST)\bin\$(PROGRAM_NAME) /SUBSYSTEM:CONSOLE,5.02 /machine:$(MACHINE)
!ELSE
CURL_LFLAGS   = /nologo /out:$(DIRDIST)\bin\$(PROGRAM_NAME) /SUBSYSTEM:CONSOLE,5.01 /machine:$(MACHINE)
!ENDIF

Compile

  1. Open the command prompt and enter the build directory:
cd c:\php-sdk\extensions
  1. Run:
buildcurlXX.bat
  1. Destination folder for binaries:
C:\php-sdk\extensions\curl-7.50.3\builds\libcurl-vc11-xXX-release-static-ipv6-sspi