Build: Define feature test macro _DEFAULT_SOURCE
This basically makes glibc expose the same set of features as if gcc was invoked without any restricting -std=c* option. Unlike _GNU_SOURCE however, it does not enable GNU-specific extensions. So, with this macro defined the behavior of Linux with glibc should match that of other platforms.
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@ -29,7 +29,7 @@ if BINDINGS_CXX
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local_includes += -Ibindings/cxx/include -I$(srcdir)/bindings/cxx/include -Ibindings/cxx
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endif
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# Ensure that local include directories are always searched first.
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AM_CPPFLAGS = $(local_includes) -D_POSIX_C_SOURCE=200112L -DFIRMWARE_DIR='"$(FIRMWARE_DIR)"'
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AM_CPPFLAGS = $(local_includes) -D_DEFAULT_SOURCE -DFIRMWARE_DIR='"$(FIRMWARE_DIR)"'
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# The tests CFLAGS are a superset of the libsigrok CFLAGS, and the
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# python bindings CFLAGS are a superset of the C++ bindings CFLAGS.
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