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AX_CC_TENTDEF
Determine whether the C compiler supports C tentative defintions. See K&R book Appendix A10.2 on ’extern’ and tentative definitions. Some compilers use a ’strict definition-reference model’ Traditionally most UNIX C compilers support tentative definitions, whereas some compiler such as Metrowerks or WATCOM C do not.
The $ac_cv_tentdef variable will be either no or yes, and can be overridden on the command line using –with-tentdef
See also: ax_cc_attrcommon.m4 for a __attribute__(( __common__)) test
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Copyright © 1996-2023 David Stes
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