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    <p>I have a c file for hardware initialization and a c++ file that calls methods from it. When I attempt to compile them using g++, I get the following</p> <pre><code>g++ testPegio.cpp -o testPeg </code></pre> <p>I get the following:</p> <blockquote> <p>In file included from /usr/include/c++/4.6/chrono:35:0, from testPegio.cpp:6: /usr/include/c++/4.6/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.</p> </blockquote> <p>So I try this:</p> <pre><code>g++ testPegio.cpp -o testPeg -std=c++0x </code></pre> <p>And I get:</p> <blockquote> <p>/tmp/cczOOOyb.o: In function <code>main': testPegio.cpp:(.text+0xc): undefined reference to</code>pegio_init' collect2: ld returned 1 exit status</p> </blockquote> <p>Here are the important snippets of code:</p> <p>pegio.h</p> <pre><code>#include &lt;stdlib.h&gt; #include &lt;stdio.h&gt; #include &lt;unistd.h&gt; //used for uart #include &lt;fcntl.h&gt; //used for uart #include &lt;termios.h&gt; //used for uart #include &lt;string.h&gt; #include &lt;string&gt; #define BAUD_RATE B1152000 #define BYTE_SIZE CS8 #define MAX_STRING_LEN 80 #define true 1 #define false 0 typedef int bool; extern char pegio_init(void); // initialize serial port extern char pegio_deinit(void); // deinitialize serial port extern void pegio_serial_write(char inStr[MAX_STRING_LEN]); // serial write method extern void pegio_serial_read(char * str); // serial read method extern bool charCheck(char ch); // character check </code></pre> <p>pegio.c</p> <pre><code>#include "pegio.h" int uart0_filestream = -1; // ** INITIALIZE THE UART ** char pegio_init(void) { uart0_filestream = open("/dev/ttyAMA0", O_RDWR | O_NOCTTY | O_NDELAY); if (uart0_filestream == -1) { //ERROR - Can't open serial port printf("Error - Unable to open UART. Ensure it is not in use by another application\n"); } struct termios options; tcgetattr(uart0_filestream, &amp;options); options.c_cflag = BAUD_RATE | BYTE_SIZE | CLOCAL | CREAD; //&lt;Set the baud rate options.c_iflag = IGNPAR | ICRNL; options.c_oflag = 0; options.c_lflag = 0; tcflush(uart0_filestream, TCIFLUSH); tcsetattr(uart0_filestream, TCSANOW, &amp;options); return 0; } // ** DEINITIALIZE THE UART ** char pegio_deinit() { close(uart0_filestream); return 0; } </code></pre> <p>And finally, testPeg.cpp</p> <pre><code>extern "C" { #include "pegio.h" } #include &lt;iostream&gt; #include &lt;chrono&gt; #include &lt;stdlib.h&gt; int main() { int result = pegio_init(); return result; } </code></pre> <p>Any ideas??</p>
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