Installing/compiling in Cygwin/MinGW - How to set the include “path”? (symbolic link?)

Question

I have been trying to install/compile C libraries in Windows 7 using Cygwin and MinGW. However, I am getting errors like these during make:

sys/         


        

Answer 1

Build libigraph with minGW without having "sys/times.h"

That may be interesting for all building "igraph" and don't want to create it with "cygwin" but with "mingw".

In my "msys / mingw" environment, I have my "source code" in. "C:\msys\1.0\src" directory.
igraph dir. == C:\msys\1.0\src\igraph-0.6

• Run c:\msys\1.0\msys.bat
• cd to the top root cd /
• cd to igraph cd usr/src/igraph-0.6
  Note: There is no usr folder in C:\msys\1.0\. Take care do'nt create a usr folder !!!
• Type ./configure Now the msys shell look something like

Administrator@drserver-p /usr/src/igraph-0.6
$ ./configure

• hit "Enter"

it takes a while.

Change of files.

• goto igraph-0.6\src
• Open with Notepadd++ or another editor the "Makefile"
  Goto line 832 or search for libf2c_la_CFLAGS =
  Put -DUSE_CLOCK after libf2c_la_CFLAGS =
  Now it looks like libf2c_la_CFLAGS = -DUSE_CLOCK -DSkip_f2c_Undefs ....
• Open igraph-0.6\src\f2c\uninit.c
• Goto Line 182 or serach for _control87(EM_DENORMAL
  comment this line /* _control87(EM_DENORMAL ..... */

• Open igraph-0.6\src\f2c\s_paus.c
  Goto Line 84 or search for pause();
  comment this line /* pause(); */

• Type make Now the msys shell look something like

Administrator@drserver-p /usr/src/igraph-0.6
$ make

• hit "Enter"

If it works it takes about 1 hour !

Answer 2

see http://mail.kde.org/pipermail/kde-windows/2006-May/000194.html as they say even if the times.h is put there its functions may not be implemented by mingw

when running ./configure i'm getting this(its hard to notice)

so first try copying the times.h and then use ./configure and see if this error isn't there

Answer 3

you should check your makefile, the CFLAGS/CPPFLAGS has -DWIN32 -D_WINDOWS for windows. in other words， you should never access the sys/times code branch on windows.

Answer 4

After much investigation, the problem turned out to be that:

1. MinGW does not have sys/times.h.
2. Cygwin has it, but my Cyqwin was using the gcc in my python directory, which is MinGW's gcc.

This was discovered while trying to resolve another problem here:

Cannot compile C code with #include <sys/times.h> in Cygwin

So it turns out that my problem had nothing to do with the include path or making symbolic links, but rather, the gcc version/type was wrong. This fact eluded me because I was running a clean installation of Cygwin and didn't know that it would automatically use the MinGW's gcc in my Python folder.