AX_OPEN62541_CHECK_H([HEADERS = `...see_below...'], [ACTION-IF-FOUND],
[ACTION-IF-NOT-FOUND])
Searches for the header file(s) of the open62541 library [1].
The open62541 library is a cmake-based project, that provides its header files in one of two layouts:
1) As individual files, e.g. ua_config.h, ua_server.h, ua_types.h, ... 2) As a single amalgamation file open62541.h
The second case is enabled when configuring open62541 with the options "-D UA_ENABLE_AMALGAMATION=true to" cmake, which seems to be preferred. Code using the library can distinguish which layout is used by checking for the macro "UA_NO_AMALGAMATION": if it is defined, the first layout is used.
The AX_OPEN62541_CHECK_H macro checks first for the amalgamation and, if that is not found, for the individual headers. It defines "UA_NO_AMALGAMATION" if necessary.
The individual headers to check for if no amalgamation is found can be provided as a space-separated list in the first argument. If that is empty, it defaults to all files known to be contained in the amalgamation as of v0.2.0 of the library:
* ms_stdint.h * ua_client.h * ua_client_highlevel.h * ua_config.h * ua_config_standard.h * ua_connection.h * ua_constants.h * ua_job.h * ua_log.h * ua_log_stdout.h * ua_network_tcp.h * ua_nodeids.h * ua_server.h * ua_server_external_ns.h * ua_types.h * ua_types_generated.h * ua_types_generated_handling.h
If the with_open62541 shell variable is set to "no" (e.g. from running the AX_OPEN62541_PATH macro and the user giving configure the option "–without-open62541"), then expands ACTION-IF-NOT-FOUND without any checks.
[1]: <http://open62541.org/>
Download the latest version of ax_open62541_check_h.m4 or browse the macro’s revision history.
Copyright © 2016,2017 Olaf Mandel olaf@mandel.name
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