diff options
Diffstat (limited to 'm4/make.m4')
| -rw-r--r-- | m4/make.m4 | 61 |
1 files changed, 27 insertions, 34 deletions
diff --git a/m4/make.m4 b/m4/make.m4 index b3ddca92c..723565d1d 100644 --- a/m4/make.m4 +++ b/m4/make.m4 @@ -1,6 +1,6 @@ # Check to see how 'make' treats includes. -*- Autoconf -*- -# Copyright (C) 2001-2017 Free Software Foundation, Inc. +# Copyright (C) 2001-2018 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, @@ -8,42 +8,35 @@ # AM_MAKE_INCLUDE() # ----------------- -# Check to see how make treats includes. +# Check whether make has an 'include' directive that can support all +# the idioms we need for our automatic dependency tracking code. AC_DEFUN([AM_MAKE_INCLUDE], -[am_make=${MAKE-make} -cat > confinc << 'END' +[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive]) +cat > confinc.mk << 'END' am__doit: - @echo this is the am__doit target + @echo this is the am__doit target >confinc.out .PHONY: am__doit END -# If we don't find an include directive, just comment out the code. -AC_MSG_CHECKING([for style of include used by $am_make]) am__include="#" am__quote= -_am_result=none -# First try GNU make style include. -echo "include confinc" > confmf -# Ignore all kinds of additional output from 'make'. -case `$am_make -s -f confmf 2> /dev/null` in #( -*the\ am__doit\ target*) - am__include=include - am__quote= - _am_result=GNU - ;; -esac -# Now try BSD make style include. -if test "$am__include" = "#"; then - echo '.include "confinc"' > confmf - case `$am_make -s -f confmf 2> /dev/null` in #( - *the\ am__doit\ target*) - am__include=.include - am__quote="\"" - _am_result=BSD - ;; - esac -fi -AC_SUBST([am__include]) -AC_SUBST([am__quote]) -AC_MSG_RESULT([$_am_result]) -rm -f confinc confmf -]) +# BSD make does it like this. +echo '.include "confinc.mk" # ignored' > confmf.BSD +# Other make implementations (GNU, Solaris 10, AIX) do it like this. +echo 'include confinc.mk # ignored' > confmf.GNU +_am_result=no +for s in GNU BSD; do + AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out]) + AS_CASE([$?:`cat confinc.out 2>/dev/null`], + ['0:this is the am__doit target'], + [AS_CASE([$s], + [BSD], [am__include='.include' am__quote='"'], + [am__include='include' am__quote=''])]) + if test "$am__include" != "#"; then + _am_result="yes ($s style)" + break + fi +done +rm -f confinc.* confmf.* +AC_MSG_RESULT([${_am_result}]) +AC_SUBST([am__include])]) +AC_SUBST([am__quote])]) |