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From: "Nellis, Kenneth" <Kenneth DOT Nellis AT xerox DOT com>
To: The Cygwin Mailing List <cygwin AT cygwin DOT com>
Subject: RE: Updated: libunistring 0.9.5-1
Date: Fri, 10 Apr 2015 14:58:33 +0000
Message-ID: <0D835E9B9CD07F40A48423F80D3B5A702E8BF21E@USA7109MB022.na.xerox.net>
References: <55275D48 DOT 9070009 AT xs4all DOT nl>
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I thought I'd play with libunistring so for the first
time I downloaded the following packages:

$ cygcheck -c libunistring-devel libunistring-doc libunistring2
Cygwin Package Information
Package              Version        Status
libunistring-devel   0.9.5-1        OK
libunistring-doc     0.9.5-1        OK
libunistring2        0.9.5-1        OK
$

Then wrote what I thought would be a trivial first program.

#include <uniname.h>
#include <stdio.h>
int main (void)
{
    char buffer[UNINAME_MAX] = "(undefined)";
    ucs4_t uc = 0x20AC; /* euro symbol */
    unicode_character_name (uc, buffer);
    puts (buffer);
    return 0;
}

It compiles fine, but I don't know how to get it to link.

$ gcc -lunistring unicode_character_name.c
/tmp/ccaJ19ki.o:unicode_character_name.c:(.text+0x57): undefined reference to `unicode_character_name'
/tmp/ccaJ19ki.o:unicode_character_name.c:(.text+0x57): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `unicode_character_name'
collect2: error: ld returned 1 exit status
$

The only relevant library file that I found in the installation
(https://cygwin.com/packages/x86_64/libunistring-devel/libunistring-devel-0.9.5-1)
is usr/lib/libunistring.dll.a, the "dll" part of which seems odd to me.
Specifying -lunistring.dll produced the same error message.

Ideas?

--Ken Nellis