Getting "checking for library stdc++... no" when trying to compile ncurses on lucid

Arenlor · 06-27-2010, 11:41 PM

I do have libstdc++6 and libstdc++6-4.4-dev installed though. I can't seem to figure out why it wouldn't detect it. Is it just a bug in ncurses' configure or what?

business_kid · 06-28-2010, 06:21 AM

I presume that's crapping out on the configure. The practise is to post from the first error you get, which helps.

Anyhow, run ldconfig after checking that the directory you have libstdc++* in is in /etc/ld.so.conf. Beware that you need 32 bit for 32 bit compile, 64 bit for 64bit compile.

Arenlor · 06-28-2010, 08:23 AM

I'm building a CLFS and was reading the configuration logs so that I could learn some about it, and it didn't give an error, just that one line about it. Also it does not look like it's in there. It just includes a .d directory, which has several files, none of which have it. The two that could have it are:
cat libc.conf
# libc default configuration
/usr/local/lib

cat x86_64-linux-gnu.conf
# Multiarch support
/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu

So I think I need to create/edit a file, but not sure exactly what I need to do, scratch what I had posted, found it in /usr/lib32 and /usr/lib. So where do I add it?

business_kid · 06-29-2010, 04:13 AM

/Guessing here:

You have clfs going on a 64 bit box. You are cross compiling for what? 32 bits? ARM? Sparc? PPC?
You need the libraries for the particular cpu, and width installed somewhere. It may help to use
./configure --with-libdir=/somewhere/strange

Arenlor · 07-01-2010, 03:24 PM

Sorry, had a bit of a week. I'm going on the first pass to make the cross-compiler actually. Yes I'm on 64bit, and I'm using CLFS to make a multilib system. Should I try to install the 32 libraries (if available) to see if that fixes it?

Arenlor · 07-01-2010, 07:32 PM

Figured this out on my own. Had to read a few lines through the configure file to find the cause of this bug. I've submitted a patch, but for anyone looking for this, this will fix the issue on ncurses 5.7, with it incorrectly giving a false negative on finding libstdc++. Oh and yes, that's line 14770 there.

Code:

--- configure.orig	2010-07-01 20:12:45.469359758 -0400
+++ configure	2010-07-01 20:11:49.370089277 -0400
@@ -14770,15 +14770,11 @@
 #line 14770 "configure"
 #include "confdefs.h"
 
-#include <strstream.h>
-int
-main ()
+#include <strstream>
+int main ()
 {
-
-char buf[80];
-strstreambuf foo(buf, sizeof(buf))
-
-  ;
+  char buf[80];
+  std::strstreambuf foo(buf, sizeof(buf));
   return 0;
 }
 _ACEOF