libdtrace-ctf/Makeconfig at master · oracle/libdtrace-ctf · GitHub

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# Determine properties of the system and write a config.h.
#
# Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
#
# Licensed under the Universal Permissive License v 1.0 as shown at
# http://oss.oracle.com/licenses/upl.
#
# Licensed under the GNU General Public License (GPL), version 2. See the file
# COPYING in the top level of this tree.

# The configuration header file.

CONFIG_H = $(objdir)/config.h

# Generate a makefile rule to check for the presence of SYMBOL
# in LIBRARY and emit an appropriate header file fragment into
# a file under $(objdir)/.config.
#
# The first argument must be suitable for a filename fragment,
# for a makefile rule name and for a #define.
#
# Syntax: $(call check-symbol,name,symbol,library)
define check-symbol-rule
$(objdir)/.config/config.$(1).h: $(objdir)/.config/.dir.stamp
	if echo 'void $(2)(); int main(void) { $(2)(); }' | \
		$(CC) $(CFLAGS) $(LDFLAGS) -o /dev/null -x c - -l$(3) >/dev/null 2>&1; then \
	    echo '#define HAVE_$(1) 1' > $(objdir)/.config/config.$(1).h; \
	else \
	    echo '/* #undef HAVE_$(1) */' > $(objdir)/.config/config.$(1).h; \
	fi

$(CONFIG_H): $(objdir)/.config/config.$(1).h
endef

# Generate a makefile rule to check for the presence of HEADER
# and emit an appropriate header file fragment into a file
# under $(objdir)/.config.
#
# The first argument must be suitable for a filename fragment,
# for a makefile rule name and for a #define.
#
# Syntax: $(call check-header-rule,name,header)
define check-header-rule
$(objdir)/.config/config.$(1).h: $(objdir)/.config/.dir.stamp
	if echo '#include <$(2)>' | \
		$(CC) $(CFLAGS) $(LDFLAGS) -c -o /dev/null -x c - >/dev/null 2>&1; then \
	    echo '#define HAVE_$(1)_H 1' > $(objdir)/.config/config.$(1).h; \
	else \
	    echo '/* #undef HAVE_$(1)_H */' > $(objdir)/.config/config.$(1).h; \
	fi

$(CONFIG_H): $(objdir)/.config/config.$(1).h
endef

$(objdir)/.config/config.bfd_section_size.h: $(objdir)/.config/.dir.stamp
	if printf '#include <stdio.h>\n#include <bfd.h>\nint main (void) { asection *foo = NULL; printf ("%%li", bfd_section_size (foo)); }' | \
		$(CC) $(CFLAGS) $(LDFLAGS) -c -o /dev/null -x c - >/dev/null 2>&1; then \
	    echo '#define HAVE_ONE_ARG_BFD_SECTION_SIZE 1' > $(objdir)/.config/config.bfd_section_size.h; \
	else \
	    echo '/* #undef HAVE_ONE_ARG_BFD_SECTION_SIZE */' > $(objdir)/.config/config.bfd_section_size.h; \
	fi
$(CONFIG_H): $(objdir)/.config/config.bfd_section_size.h

$(objdir)/.config/.dir.stamp:
	mkdir -p $(objdir)/.config
	touch $(objdir)/.config/.dir.stamp

$(CONFIG_H):
	echo '/* This file is automatically generated. */' > $(objdir)/config.h
	cat $(objdir)/.config/*.h >> $(objdir)/config.h 2>/dev/null || true

$(eval $(call check-symbol-rule,MMAP,mmap,c))
$(eval $(call check-symbol-rule,PREAD,pread,c))
$(eval $(call check-symbol-rule,BSEARCH_R,bsearch_r,c))
$(eval $(call check-header-rule,BYTESWAP,byteswap.h))
$(eval $(call check-header-rule,ENDIAN,endian.h))