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|Oracle GlassFish Server Message Queue 4.5 Developer's Guide for C Clients|
Message Queue provides several sample Message Queue C-client applications that illustrate how to send and receive messages. Before you run these applications, read through the next two sections to make sure that you understand the general procedure and requirements for building and running Message Queue C-client programs.
The Message Queue C client includes the header files (mqcrt.h), the C client runtime shared library mqcrt, and its direct dependency libraries. When writing a Message Queue C client application, you should include the header files and link to the runtime library mqcrt.
The header files are located in IMQ_HOME/include, and the 32-bit runtime library is located in IMQ_HOME/lib. A 64-bit runtime library is available for the following platforms in the specified location:
Solaris SPARC: IMQ_HOME/lib/sparcv9
Solaris x86: IMQ_HOME/lib/amd64
Use the appropriate compiler for your platform, as described in the Oracle GlassFish Server Message Queue 4.5 Release Notes.
When compiling a Message Queue C client application, you need to specify the pre-processor definition shown for each platform in Table 1-1. This definition is used to support Message Queue fixed-size integer types.
Table 1-1 Preprocessor Definitions for Supporting Fixed-Size Integer Types
When building a Message Queue C client application, you should be aware that the Message Queue C runtime library is a multi-threaded library and requires C++ runtime library support:
On Linux, this support is provided by the gcc/g++ libstdc++ runtime library.
On AIX, this support is provided by the C++ runtime library in the in the XLC/C++ Runtime Environment.
To run a Message Queue C-client application, you need to make sure that the application can find the mqcrt shared library. Please consult the documentation for your compiler to determine the best way to do this.
You also need to make sure that the appropriate C++ runtime support library, as described in C++ Runtime Library Support is available.
On Windows you also need to make sure that your application can find the dependent libraries NSPR and NSS that are shipped with Message Queue. These may be different from the NSPR and NSS libraries that are installed on your system to support the Netscape browser and GlassFish Server. The mqcrt shared library depends directly on the NSPR and NSS versions installed with Message Queue. If a different version of the libraries is loaded at runtime, you may get a runtime error specifying that the libraries being used are incompatible. If this happens, look on your system to see if other versions of the NSPR or NSS libraries exist; for example, libnspr4.dll or nss3.dll. If you find such versions, take appropriate action to make sure that Message Queue can access the versions it needs.