On 5/21/2010 8:21 AM, bo yu wrote:
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?
gfortran is intended to be a full replacement for g77, as well as
supporting f95 and some f2003.
g77 might work for f77 code in .f90 source format, if you figured out
the correct free form options. It won't handle much f90 syntax. It
hasn't been maintained for about 5 years.
If you have set gfortran as your compiler, the .f90.o rule would look
just like the .f.o rule.
You should persuade the Makefile to use the Fortran compiler rather than
gcc for compiling and linking Fortran source code. g77 and gfortran can
handle .c files automatically.
--
Tim Prince
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