Error when make

[alexandrelealjr]

[ 16%] Building C object CMakeFiles/m4api.dir/m4api.c.o
/home/alexandrelealjr/Downloads/m4api/m4api.c:46:8: error: variable \u2018m4CurrentVersion\u2019 has initializer but incomplete type
struct m4Version m4CurrentVersion = {
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:47:5: error: unknown field \u2018major\u2019 specified in initializer
.major = 0,
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:47:14: warning: excess elements in struct initializer
.major = 0,
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:47:14: note: (near initialization for \u2018m4CurrentVersion\u2019)
/home/alexandrelealjr/Downloads/m4api/m4api.c:48:5: error: unknown field \u2018minor\u2019 specified in initializer
.minor = 0,
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:48:14: warning: excess elements in struct initializer
.minor = 0,
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:48:14: note: (near initialization for \u2018m4CurrentVersion\u2019)
/home/alexandrelealjr/Downloads/m4api/m4api.c: In function \u2018m4Init\u2019:
/home/alexandrelealjr/Downloads/m4api/m4api.c:210:7: warning: implicit declaration of function \u2018m4CheckVersion\u2019 [-Wimplicit-function-declaration]
if (m4CheckVersion(buf) < 0)
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:213:3: error: invalid use of undefined type \u2018struct m4Version\u2019
printf("Firmware version %d.%d\n", m4CurrentVersion.major, m4CurrentVersion.minor);
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:213:3: error: invalid use of undefined type \u2018struct m4Version\u2019
/home/alexandrelealjr/Downloads/m4api/m4api.c:215:3: error: invalid use of undefined type \u2018struct m4Version\u2019
if (m4CurrentVersion.major < 2)
^
/home/alexandrelealjr/Downloads/m4api/m4api.c: In function \u2018m4CheckVersion\u2019:
/home/alexandrelealjr/Downloads/m4api/m4api.c:241:3: error: invalid use of undefined type \u2018struct m4Version\u2019
m4CurrentVersion.major = ((buf[23]) >> 4) & 0x0f;
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:242:3: error: invalid use of undefined type \u2018struct m4Version\u2019
m4CurrentVersion.minor = (buf[23]) & 0x0f;
^
/home/alexandrelealjr/Downloads/m4api/m4api.c:244:3: error: invalid use of undefined type \u2018struct m4Version\u2019
if (m4CurrentVersion.major == 0)
^
/home/alexandrelealjr/Downloads/m4api/m4api.c: In function \u2018m4ParseValue\u2019:
/home/alexandrelealjr/Downloads/m4api/m4api.c:368:10: warning: implicit declaration of function \u2018strcasecmp\u2019 [-Wimplicit-function-declaration]
if (!strcasecmp("never", strval))
^
/home/alexandrelealjr/Downloads/m4api/m4api.c: In function \u2018m4SetFloat\u2019:
/home/alexandrelealjr/Downloads/m4api/m4api.c:420:10: warning: implicit declaration of function \u2018m4SetBinary\u2019 [-Wimplicit-function-declaration]
return m4SetBinary(dev, field, binary);
^
CMakeFiles/m4api.dir/build.make:62: recipe for target 'CMakeFiles/m4api.dir/m4api.c.o' failed
make[2]: *** [CMakeFiles/m4api.dir/m4api.c.o] Error 1
CMakeFiles/Makefile2:104: recipe for target 'CMakeFiles/m4api.dir/all' failed
make[1]: *** [CMakeFiles/m4api.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2