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Suppress compiler warnings when building with --enable-dtrace.
Most versions of "dtrace -h" drop const qualifiers from the declarations of probe functions (though macOS gets it right). This causes compiler warnings when we pass in pointers to const. Repair by extending our existing post-processing of the probes.h file. To do so, assume that all "char *" arguments should be "const char *"; that seems reasonably safe. Thomas Munro Discussion: https://postgr.es/m/CAEepm=2j1pWSruQJqJ91ZDzD8w9ZZDsM4j2C6x75C-VryWg-_w@mail.gmail.com
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@ -49,10 +49,15 @@ ifneq ($(enable_dtrace), yes)
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probes.h: Gen_dummy_probes.sed
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endif
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# We editorialize on dtrace's output to the extent of changing the macro
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# names (from POSTGRESQL_foo to TRACE_POSTGRESQL_foo) and changing any
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# "char *" arguments to "const char *".
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probes.h: probes.d
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ifeq ($(enable_dtrace), yes)
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$(DTRACE) -C -h -s $< -o $@.tmp
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sed -e 's/POSTGRESQL_/TRACE_POSTGRESQL_/g' $@.tmp >$@
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sed -e 's/POSTGRESQL_/TRACE_POSTGRESQL_/g' \
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-e 's/( *char \*/(const char */g' \
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-e 's/, *char \*/, const char */g' $@.tmp >$@
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rm $@.tmp
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else
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sed -f $(srcdir)/Gen_dummy_probes.sed $< >$@
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