Moved configure to suggestions.

README

@@ -20,7 +20,10 @@ After untarring the distribution and then doing "cd gptl", construct a
 macros.make file by editing one of the templates provided (currenty there's
 macros.make.linux, and macros.make.sicortex) that is closest to the machine
 you're building the library on. Step-by-step instructions for setting each
-configuration option are embedded in that file. Then:
+configuration option are embedded in that file. If unsure of some settings,
+you can run "./suggestions". This is an autoconf "configure" script which has
+been modified to just print suggestions, rather than creating any output
+files. After creating macros.make:
 
 % make all
 % make install

configure.ac

@@ -1,19 +1,23 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_INIT(private.h)
 AC_LANG(C)
-
+echo "This script provides suggestions for settings to apply in macros.make"
+echo "You can pass things like FC=gfortran or CC=pathcc to it to override defaults."
 AC_PROG_MAKE_SET
 AC_PROG_CC()
-#AC_PROG_FC()
+echo "Assuming C compiler is $CC"
+AC_PROG_FC()
+echo "Assuming Fortran compiler is $FC"
 dnl This barfs when CC is pgcc and F77 pgf90
 AC_FC_FUNC(z_zz,z_zz)
 case $z_zz in
-    z_zz__)     echo FORTRANDOUBLEUNDERSCORE ;;
-    z_zz_)      echo FORTRANUNDERSCORE ;;
-    Z_ZZ)       echo FORTRANCAPS ;;
+    z_zz__)     echo "Fortran name mangling: -DFORTRANDOUBLEUNDERSCORE" ;;
+    z_zz_)      echo "Fortran name mangling: -DFORTRANUNDERSCORE" ;;
+    Z_ZZ)       echo "Fortran name mangling: -DFORTRANCAPS" ;;
+    *)          echo "Fortran name mangling: none" ;;
 esac
 
 dnl For proper handling of const and inline
 AC_C_INLINE
-dnl Checks for library functions.
-AC_FUNC_VPRINTF
+echo "Inlining: -Dinline=$ac_cv_c_inline"
+dnl AC_FUNC_VPRINTF

macros.make.linux

@@ -26,7 +26,7 @@ endif
 
 # For gcc, -Dinline=inline is a no-op. For other C compilers, things like 
 # -Dinline=__inline__ may be required. Autoconf test AC_C_INLINE can find the 
-# right definition.
+# right definition. If unsure, try running "./suggestions CC=<your_C_compiler>"
 INLINEFLAG  = -Dinline=inline
 
 # To build the Fortran interface, set FORTRAN=yes and define the entries under

macros.make.sicortex

@@ -1,5 +1,5 @@
 # Where to install GPTL library, include files, and man pages
-INSTALLDIR = /home/jrosinski/mips
+INSTALLDIR = $(HOME)/mips
 
 # C compiler and flags: symbols, high optimization, inlining
 CC     = pathcc
@@ -24,16 +24,19 @@ else
   LDFLAGS += -lpthread
 endif
 
-# For gcc, -Dinline=inline is a no-op. For other C compilers, things like -Dinline=__inline__
-# may be required. Autoconf test AC_C_INLINE can find the right definition.
+# For gcc, -Dinline=inline is a no-op. For other C compilers, things like 
+# -Dinline=__inline__ may be required. Autoconf test AC_C_INLINE can find the 
+# right definition. If unsure, try running "./suggestions CC=<your_C_compiler>"
 INLINEFLAG  = -Dinline=inline
 
 # To build the Fortran interface, set FORTRAN=yes and define the entries under
 # ifeq ($(FORTRAN),yes). Otherwise, set FORTRAN=no and skip this section.
 FORTRAN = yes
 ifeq ($(FORTRAN),yes)
-# Fortran name mangling: possibilities are: leave UNDERSCORING blank (none),
-# -DFORTRANDOUBLEUNDERSCORE (e.g. g77), and -DFORTRANUNDERSCORE (e.g. gfortran)
+# Fortran name mangling: possibilities are: leave UNDERSCORING blank meaning none
+# (e.g. xlf90), -DFORTRANDOUBLEUNDERSCORE (e.g. g77), and -DFORTRANUNDERSCORE 
+# (e.g. gfortran, pathf95)
+#
 #  UNDERSCORING =
   UNDERSCORING = -DFORTRANUNDERSCORE
   UNDERSCORING = -DFORTRANDOUBLEUNDERSCORE