workaround for problem with systems where you can't run interactively

[Gerardo]


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@1477 c92efa57-630b-4861-b058-cf58834340f0

configure

@@ -1401,10 +1401,23 @@ build_os=`echo $ac_cv_build | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 
 
 
+# many HPC systems are configured so that running programs interactively
+# is disabled: on those systems, AC_PROG_F77 and AC_PROG_CC would fail
+# because they can't run the compiled executables
+# to work around that, let's pretend we are cross-compiling even if we aren't
+if test "$host" = "" -o "$host" = "$build"
+then
+	# fake cross-compilation
+	# this relies on undocumented Autoconf behavior!!!
+	# (if you know a better way, please tell me)
+	host=$build
+	cross_compiling=maybe
+fi
+
 if test "$arch" = ""
 then
 	# identify architecture
-	case $build in
+	case $host in
 		ia64-*-linux-gnu | x86_64-*-linux-gnu ) arch=linux64 ;;
 		*-pc-linux-gnu )                        arch=linux32 ;;
 		*-ibm-aix* )                            arch=aix     ;;
@@ -1486,7 +1499,7 @@ mac )
 echo "$as_me: WARNING: unsupported architecture" >&2;}
 	problems="$problems\\
 		  unsupported architecture:\\
-		  $build\\"
+		  $host\\"
 	try_f90="f90"
 	try_ar="ar"
 	try_arflags="ruv"
@@ -1589,7 +1602,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:1592:" \
+echo "$as_me:1605:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -2127,7 +2140,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:2130:" \
+echo "$as_me:2143:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5

configure.ac

@@ -36,10 +36,23 @@ if test "$topdir" = "" ; then topdir="`pwd`" ; fi
 # check system type (no cross-compilation for now)
 AC_CANONICAL_BUILD
 
+# many HPC systems are configured so that running programs interactively
+# is disabled: on those systems, AC_PROG_F77 and AC_PROG_CC would fail
+# because they can't run the compiled executables
+# to work around that, let's pretend we are cross-compiling even if we aren't
+if test "$host" = "" -o "$host" = "$build"
+then
+	# fake cross-compilation
+	# this relies on undocumented Autoconf behavior!!!
+	# (if you know a better way, please tell me)
+	host=$build
+	cross_compiling=maybe
+fi
+
 if test "$arch" = ""
 then
 	# identify architecture
-	case $build in
+	case $host in
 		ia64-*-linux-gnu | x86_64-*-linux-gnu ) arch=linux64 ;;
 		*-pc-linux-gnu )                        arch=linux32 ;;
 		*-ibm-aix* )                            arch=aix     ;;
@@ -120,7 +133,7 @@ mac )
 	AC_MSG_WARN(unsupported architecture)
 	problems="$problems\\
 		  unsupported architecture:\\
-		  $build\\"
+		  $host\\"
 	try_f90="f90"
 	try_ar="ar"
 	try_arflags="ruv"

install/configure

@@ -1401,10 +1401,23 @@ build_os=`echo $ac_cv_build | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 
 
 
+# many HPC systems are configured so that running programs interactively
+# is disabled: on those systems, AC_PROG_F77 and AC_PROG_CC would fail
+# because they can't run the compiled executables
+# to work around that, let's pretend we are cross-compiling even if we aren't
+if test "$host" = "" -o "$host" = "$build"
+then
+	# fake cross-compilation
+	# this relies on undocumented Autoconf behavior!!!
+	# (if you know a better way, please tell me)
+	host=$build
+	cross_compiling=maybe
+fi
+
 if test "$arch" = ""
 then
 	# identify architecture
-	case $build in
+	case $host in
 		ia64-*-linux-gnu | x86_64-*-linux-gnu ) arch=linux64 ;;
 		*-pc-linux-gnu )                        arch=linux32 ;;
 		*-ibm-aix* )                            arch=aix     ;;
@@ -1486,7 +1499,7 @@ mac )
 echo "$as_me: WARNING: unsupported architecture" >&2;}
 	problems="$problems\\
 		  unsupported architecture:\\
-		  $build\\"
+		  $host\\"
 	try_f90="f90"
 	try_ar="ar"
 	try_arflags="ruv"
@@ -1589,7 +1602,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:1592:" \
+echo "$as_me:1605:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -2127,7 +2140,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:2130:" \
+echo "$as_me:2143:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5

install/configure.ac

@@ -36,10 +36,23 @@ if test "$topdir" = "" ; then topdir="`pwd`" ; fi
 # check system type (no cross-compilation for now)
 AC_CANONICAL_BUILD
 
+# many HPC systems are configured so that running programs interactively
+# is disabled: on those systems, AC_PROG_F77 and AC_PROG_CC would fail
+# because they can't run the compiled executables
+# to work around that, let's pretend we are cross-compiling even if we aren't
+if test "$host" = "" -o "$host" = "$build"
+then
+	# fake cross-compilation
+	# this relies on undocumented Autoconf behavior!!!
+	# (if you know a better way, please tell me)
+	host=$build
+	cross_compiling=maybe
+fi
+
 if test "$arch" = ""
 then
 	# identify architecture
-	case $build in
+	case $host in
 		ia64-*-linux-gnu | x86_64-*-linux-gnu ) arch=linux64 ;;
 		*-pc-linux-gnu )                        arch=linux32 ;;
 		*-ibm-aix* )                            arch=aix     ;;
@@ -120,7 +133,7 @@ mac )
 	AC_MSG_WARN(unsupported architecture)
 	problems="$problems\\
 		  unsupported architecture:\\
-		  $build\\"
+		  $host\\"
 	try_f90="f90"
 	try_ar="ar"
 	try_arflags="ruv"