I've been tracing through, and a problem occurs when the compilation gets run, which is at about line 155 in file ob-eval.el, inside function org-babel-shell-command-on-region, where call-process region is called.
As far as I can see, at this point the command being called is C:/emacs/emacs-24.0.94/bin/cmdproxy -c "gcc -o \"c:/users/stanton[...]C-bin-10700opx\" \"c:/users/Stanton[...]C-src-10700bfr.c\"" (where [...] just means I deleted some more path information, but it's all valid). If I execute this exact command at the command line, the compilation works fine, and creates an executable file C-bin-10700opx.exe (note that gcc on Windows automatically adds the .exe extension if you omit it). However, after running the call-process-region command in the .el file, no executable file is produced, and error-file has the contents Access is denied Not sure why this should be, but the compilation is not happening. > -----Original Message----- > From: Eric Schulte [mailto:eric.schu...@gmx.com] > Sent: Monday, March 26, 2012 6:45 PM > To: Richard Stanton > Cc: emacs-orgmode@gnu.org > Subject: Re: [O] Problems running C code in org-mode under Windows > > Richard Stanton <stan...@haas.berkeley.edu> writes: > > > Here's a simple org file that's supposed to run some C code and print the > result: > > > > ---------------------- > > > > * Sample C code > > > > #+name: RHS.c > > #+begin_src C :noweb yes :tangle RHS.c > > #include <stdio.h> > > <<main>> > > #+end_src > > > > #+name: main > > #+begin_src C > > int main(int argc, char *argv[]) { > > int lst[argc-1]; > > int i; > > for(i=1;i<argc;i++) > > lst[i-1] = atoi(argv[i]); > > for(i=1;i<argc;i++) > > printf("%d ", lst[i-1] + 1); > > printf("\n"); > > } > > #+end_src > > > > #+call: RHS.c[:cmdline 8 7 6]() > > > > ------------------------- > > > > It works fine on my Mac, producing the result: > > > > #+RESULTS: RHS.c[:cmdline 8 7 6]() > > : 9 8 7 > > > > On my PC, however, running Windows Vista, the output is blank and > > there's a *Org-babel-error-output* buffer containing the message > > > > Access is denied. > > 'c:/Users/stanton/AppData/Local/Temp/babel-11948MQP/C-bin-11948Nln' > is > > not recognized as an internal or external command, operable program or > > batch file. > > > > There is a file called C-bin-11948Nln in that directory, but it has > > length 0, suggesting that something is going wrong in the compilation > > process. However, I can also see potential problems with the fact that > > the file name does not end in .exe, so the Windows shell is not easily > > going to recognize it as an executable anyway. > > > > Does anyone have this running OK under Windows? Alternatively, how can > > I track down what's going wrong in more detail? > > > > Thanks. > > > > Richard Stanton > > > > I don't have access to a windows machine so I can't debug this myself, but I > would suggest stepping through the execution of the `org-babel-C-execute' > function using edebug. This is done by first placing the cursor inside the > `org- > babel-C-execute' function, evaluating the function with C-u C-M-x, then > executing a C code block. This should give you some idea of what is going > wrong where. > > Best, > > -- > Eric Schulte > http://cs.unm.edu/~eschulte/