C source files not allowed when not using cgo or SWIG: gccgo_c.c

[liruzhi]

I build my go program in centos 7.6 failed, the error is :

package command-line-arguments
           imports blog/config
           imports github.com/spf13/viper
           imports github.com/fsnotify/fsnotify
           imports golang.org/x/sys/unix: C source files not  allowed when not using cgo or SWIG: gccgo_c.c

my go.mod is

go 1.16

require (
	github.com/dgrijalva/jwt-go v3.2.0+incompatible
	github.com/fsnotify/fsnotify v1.5.3 // indirect
	github.com/gin-contrib/static v0.0.1
	github.com/gin-gonic/gin v1.7.7
	github.com/go-redis/redis/v8 v8.11.5 // indirect
	github.com/hidez8891/shm v0.0.0-20200313135933-0ec4df5f28c7 // indirect
	github.com/json-iterator/go v1.1.12
	github.com/mitchellh/mapstructure v1.5.0 // indirect
	github.com/pelletier/go-toml v1.9.5 // indirect
	github.com/robfig/cron/v3 v3.0.0
	github.com/spf13/viper v1.11.0
	github.com/tidwall/gjson v1.14.1
	github.com/xuri/excelize/v2 v2.6.1
	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
	golang.org/x/text v0.3.7
)

[liruzhi]

the gccgo_c.c file were encrypted by other software.