How to compile Fortran 90 subroutine under CYGWIN

[bo yu]

Tim,
 
Thanks for your reply.
 
I have the new version of cygwin installed in my computer, in which the g77, g++, gcc, gfortran, C++ compiler are in C:\cygwin\bin.

Firstly, I use cygwin build C programs and For77 programs. It works very well. Now, I add two For90 programs and want to build following program together in cygwin:
 
Fortran 77 program:   runslhg.f , intrface.f 
Fortran 90 program:   swan_init.f90 ,  swan_loopstep.f90
C Program:            slosh2.c ,  cstart.c etc.
 
Step 1: I replace g77 with gfortran in 'makefile', 
 
#!/bin/make
SHELL = /bin/sh
CC = gcc
F77 = gfortran
STRIP = strip
STD_FLAGS = -O3 -Wall -pedantic -ansi
FFLAGS =
LD_FLAGS = -Wl,--stack,8000000
STD_DEF = -D_WINDOWS_ -D_GCC_
STD_INC = -I.
STD_LIB = -lg2c -L/usr/lib -lm
PRJ_NAME = sloshDos
TARGETS = $(PRJ_NAME)
CFLAGS = $(STD_FLAGS) $(STD_DEF) $(STD_INC)
############################
# FILES
############################
H_SOURCES = slosh2.h \
            pack.h \
            myassert.h \
            myutil.h \
            savellx.h \
            complex.h \
            clock.h \
            tendian.h \
            tio3.h
C_OBJECTS = slosh2.o \
            pack.o \
            myassert.o \
            myutil.o \
            savellx.o \
            complex.o \
            clock.o \
            tendian.o \
            tio3.o
F_OBJECTS = runslhg.o \
            intrface.o \
            swan_init.o \
            swan_loopstep.o
            
C_MAIN = cstart.c
############################
# TARGETS
############################
all: $(TARGETS)
 @echo ""
$(PRJ_NAME): $(C_OBJECTS) $(F_OBJECTS) $(C_MAIN) $(LIB_DEPENDS) $(H_SOURCES)
 $(CC) $(C_MAIN) $(CFLAGS) $(LD_FLAGS) $(C_OBJECTS) $(F_OBJECTS) $(STD_LIB) -o $(PRJ_NAME)
 $(STRIP) -s $(PRJ_NAME).exe
install:
 cp *.exe ../../bin
clean:
 rm -f *.o *.bak *.BAK
############################
# SUFFIXES
############################
.c.o : $(H_SOURCES)
 $(CC) -c $(CFLAGS) $<
.f.o:
 ${F77} -c ${FFLAGS} $<
 

Step 2: in cygwin, I ran makefile, The error message is
 
gcc –c runslhg.f
gcc –c intrface.f
make: *** No rule to make target ‘swan_init.o’, needed by ‘sloshDos’. Stop
 
Step 3: To test if gfortran compiler wotk for For77 program, I try to build C program and For70 programs only using gfortran, I ran makefile, The error message is
 
runslhg.o:runslhg.f:,.text+0x4f>: undefined reference to '__gfortran_st_read'
runslhg.o:runslhg.f:,.text+0x6d>: undefined reference to '__gfortran_transfer_character'
runslhg.o:runslhg.f:,.text+0x7b>: undefined reference to '__gfortran_st_read_done'
 
 
My Questions are
(1) Does gfortran work for fortran 90 program only? 
(2) g77 compiler works for fortran 77 programs. Does g77 work for fortran 90 programs?
(3) How to build C, FOR77 and For 90 programs together in cygwin? How to set the makefile, use seperate command for for77 and for 99?
 
 
I would appreciate any suggestion what should I look at.
 
Thanks again,
Bo
enviyub2@hotmail.com

 
 
 


----------------------------------------
> Date: Fri, 21 May 2010 05:44:43 -0700
> From: n8tm@aol.com
> To: cygwin@cygwin.com
> Subject: Re: How to compile Fortran 90 subroutine under CYGWIN
>
> On 5/21/2010 5:37 AM, bo yu wrote:
>> .c.o : $(H_SOURCES)
>> $(CC) -c $(CFLAGS) $<
>> .f.o:
>> ${F77} -c ${FFLAGS} $<
>>
>> --------------------------------------------------------------------------------------------
>> Here is the code of ‘Testfor90.f90’
>> --------------------------------------------------
>>
> make noticed that you didn't supply a rule for .f90.o
>
> Why wouldn't you use gfortran? If you are trying to use a cygwin
> installation from several years ago, it's time to update.
>
> --
> Tim Prince
>
>
> --
> Problem reports: http://cygwin.com/problems.html
> FAQ: http://cygwin.com/faq/
> Documentation: http://cygwin.com/docs.html
> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
> 		 	   		  
_________________________________________________________________
The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail.
http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple