[Pidgin] #14799: pidgin-2.10.1 fails to build due to missing -lm linker flag

[Pidgin]

#14799: pidgin-2.10.1 fails to build due to missing -lm linker flag
--------------------------+-------------------------------------------------
 Reporter:  ncopa         |     Owner:  rekkanoryo
     Type:  patch         |    Status:  new       
Component:  unclassified  |   Version:  2.10.0    
 Keywords:                |  
--------------------------+-------------------------------------------------
 The file gtkimhtmltoolbar.c uses floor(3). According to man floor(3) you
 should link with -lm.

 On Alpine Linux (uClibc) it fails to build:

 {{{
   CCLD   pidgin
 /usr/lib/gcc/i486-alpine-linux-uclibc/4.6.2/../../../../i486-alpine-linux-
 uclibc/bin/ld: gtkimhtmltoolbar.o: undefined reference to symbol 'floor'
 /usr/lib/gcc/i486-alpine-linux-uclibc/4.6.2/../../../../i486-alpine-linux-
 uclibc/bin/ld: note: 'floor' is defined in DSO /lib/libm.so.0.9.32 so try
 adding it to the linker command line
 /lib/libm.so.0.9.32: could not read symbols: Invalid operation
 collect2: ld returned 1 exit status
 make[3]: *** [pidgin] Error 1
 }}}

 I suspect glibc based distros will have same issue when they upgrade
 binutils to 2.22.

-- 
Ticket URL: <http://developer.pidgin.im/ticket/14799>
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