f77:command not found什么意思?
一个fortrun程序,在linux下编译,在终端窗口输入make后,应该开始编译,可是却提示

for d in hypoDD ncsn2pha ph2dt hista2ddsta; do (cd $d; echo $d; make all); done
hypoDD
make[1]: Entering directory `/root/Desktop/HYPODD/src/hypoDD'
g77 -O -I../../include -fno-silent -Wall -implicit -c hypoDD.f -o hypoDD.o

make[1]: f77: Command not found

make[1]: *** [hypoDD.o] Error 127

make[1]: Leaving directory `/root/Desktop/HYPODD/src/hypoDD'
ncsn2pha

make[1]: Entering directory `/root/Desktop/HYPODD/src/ncsn2pha'
g77 -O -c ncsn2pha.f -o ncsn2pha.o
...
f77: Command not found是不是没有编译器阿?多谢


------解决方案--------------------
g77是GUN的免费的fortran77编译器
去上网找个安装下应该就可以