Building root 6-14-04 from source on Windows

[Debajyoti_Sengupta]

In the file PCRE-build-out.log there are multiple instances of

c:\mingw\include\wctype.h(100): error C2059: syntax error: 'type' [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]

c:\mingw\include\wctype.h(131): error C2061: syntax error: identifier 'towlower' [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]

c:\mingw\include\wctype.h(131): error C2059: syntax error: '<parameter-list>' [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]

c:\mingw\include\wctype.h(140): error C2143: syntax error: missing '{' before '__cdecl' [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]

c:\mingw\include\ctype.h(251): fatal error C1003: error count exceeds 100; stopping compilation [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]
  pcre_compile.c

In the file PCRE-configure-err.log

CMake Warning (dev) at CMakeLists.txt:770 (GET_TARGET_PROPERTY):
  Policy CMP0026 is not set: Disallow use of the LOCATION target property.
  Run "cmake --help-policy CMP0026" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  The LOCATION property should not be read from target "pcregrep".  Use the
  target name directly with add_custom_command, or use the generator
  expression $<TARGET_FILE>, as appropriate.

This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at CMakeLists.txt:773 (GET_TARGET_PROPERTY):
  Policy CMP0026 is not set: Disallow use of the LOCATION target property.
  Run "cmake --help-policy CMP0026" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  The LOCATION property should not be read from target "pcretest".  Use the
  target name directly with add_custom_command, or use the generator
  expression $<TARGET_FILE>, as appropriate.

This warning is for project developers.  Use -Wno-dev to suppress it.

Other .log files are empty. (or have no errors)

[bellenot]

@Debajyoti_Sengupta

c:\mingw\include\wctype.h(140): error C2143: syntax error: missing ‘{’ before ‘__cdecl’ [D:\buildroot\PCRE-prefix\src\PCRE\pcre.vcxproj]

Ouch! OK, your system has many conflicts. Please make sure you don’t have your mingw system interfere with the native one (or find a clean machine)

[Debajyoti_Sengupta]

Should I uninstall mingw, reinstall and then rebuild root?

[bellenot]

Well, it depend if you need it… Mingw should simply not interfere with the command prompt/Visual Studio. If you don’t need it, just uninstall it

[Debajyoti_Sengupta]

After cleaning the system, (getting rid of minGW) and rebuilding again, root has been successfully built and the tutorials run without error.

Thanks, @bellenot for your patience, I am eternally grateful

The command, if someone stumbles upon this:

cmake -Dall=OFF -Dmathmore=OFF -Dbuiltin_zlib=ON -Dgfal=OFF -Dbuiltin_freetype=ON -Dbuiltin_ftgl=ON -Droofit=ON -Dfftw3=ON -DFFTW_INCLUDE_DIR=<path of FFTW3 installation> -DFFTW_LIBRARY=<path of FFTW3 lib file> D:\root