PolarDB-for-PostgreSQL

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# The PostgreSQL make files exploit features of GNU make that other
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# makes do not have. Because it is a common mistake for users to try
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# to build Postgres with a different make, we have this make file
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# that, as a service, will look for a GNU make and invoke it, or show
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# an error message if none could be found.
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# If the user were using GNU make now, this file would not get used
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# because GNU make uses a make file named "GNUmakefile" in preference
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# to "Makefile" if it exists. PostgreSQL is shipped with a
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# "GNUmakefile". If the user hasn't run the configure script yet, the
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# GNUmakefile won't exist yet, so we catch that case as well.
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# AIX make defaults to building *every* target of the first rule.  Start with
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# a single-target, empty rule to make the other targets non-default.
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all:
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all check install installdirs installcheck installcheck-parallel uninstall clean distclean maintainer-clean dist distcheck world check-world install-world installcheck-world:
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	@if [ ! -f GNUmakefile ] ; then \
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	   echo "You need to run the 'configure' program first. See the file"; \
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	   echo "'INSTALL' for installation instructions." ; \
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	   false ; \
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	 fi
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	@IFS=':' ; \
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	 for dir in $$PATH; do \
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	   for prog in gmake gnumake make; do \
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	     if [ -f $$dir/$$prog ] && ( $$dir/$$prog -f /dev/null --version 2>/dev/null | grep GNU >/dev/null 2>&1 ) ; then \
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	       GMAKE=$$dir/$$prog; \
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	       break 2; \
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	     fi; \
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	   done; \
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	 done; \
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	\
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	 if [ x"$${GMAKE+set}" = xset ]; then \
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	   echo "Using GNU make found at $${GMAKE}"; \
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	   unset MAKELEVEL; \
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	   $${GMAKE} $@ ; \
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	 else \
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	   echo "You must use GNU make to build PostgreSQL." ; \
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	   false; \
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	 fi
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