implicit-function-declaration

[pavlinux]

python setup.py install
running install
running build
running build_ext
building 'deep_spectre' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -g0 -ggdb0 -Ofast -mtune=native -march=native -mfpmath=sse -fexcess-precision=fast -fno-strict-aliasing --param l2-cache-size=2048 --param l1-cache-line-size=64 --param l1-cache-size=64 -D_FORTIFY_SOURCE=2 -fPIE -pie -fPIC -fstack-protector -Wl,-z,relro -Wl,-z,now -fPIC -I/usr/include/python2.7 -c deep_spectre.c -o build/temp.linux-x86_64-2.7/deep_spectre.o
deep_spectre.c: In function 'readMemoryByte':
deep_spectre.c:69:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for (volatile int z = 0; z < 100; z++) {} /* Delay (can also mfence) /
^
deep_spectre.c:69:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
deep_spectre.c:85:23: warning: pointer targets in passing argument 1 of '__rdtscp' differ in signedness [-Wpointer-sign]
time1 = __rdtscp( & junk); / READ TIMER */
^
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.9/include/x86intrin.h:27:0,
from deep_spectre.c:8:
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/ia32intrin.h:112:1: note: expected 'unsigned int *' but argument is of type 'int *'
__rdtscp (unsigned int __A) ^
deep_spectre.c:87:23: warning: pointer targets in passing argument 1 of '__rdtscp' differ in signedness [-Wpointer-sign]
time2 = __rdtscp( & junk) - time1; / READ TIMER & COMPUTE ELAPSED TIME */
^
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.9/include/x86intrin.h:27:0,
from deep_spectre.c:8:
/usr/lib/gcc/x86_64-linux-gnu/4.9/include/ia32intrin.h:112:1: note: expected 'unsigned int *' but argument is of type 'int *'
__rdtscp (unsigned int __A)
^
deep_spectre.c: At top level:
deep_spectre.c:145:15: error: variable 'deep_spectre_module' has initializer but incomplete type
static struct PyModuleDef deep_spectre_module = {
^
deep_spectre.c:146:5: error: 'PyModuleDef_HEAD_INIT' undeclared here (not in a function)
PyModuleDef_HEAD_INIT,
^
deep_spectre.c:146:5: warning: excess elements in struct initializer
deep_spectre.c:146:5: warning: (near initialization for 'deep_spectre_module')
deep_spectre.c:147:5: warning: excess elements in struct initializer
"deep_spectre", / name of module /
^
deep_spectre.c:147:5: warning: (near initialization for 'deep_spectre_module')
deep_spectre.c:148:5: warning: excess elements in struct initializer
NULL, / module documentation, may be NULL /
^
deep_spectre.c:148:5: warning: (near initialization for 'deep_spectre_module')
deep_spectre.c:149:5: warning: excess elements in struct initializer
-1, / size of per-interpreter state of the module,
^
deep_spectre.c:149:5: warning: (near initialization for 'deep_spectre_module')
deep_spectre.c:152:1: warning: excess elements in struct initializer
};
^
deep_spectre.c:152:1: warning: (near initialization for 'deep_spectre_module')
deep_spectre.c: In function 'PyInit_deep_spectre':
deep_spectre.c:156:5: warning: implicit declaration of function 'PyModule_Create' [-Wimplicit-function-declaration]
return PyModule_Create(&deep_spectre_module);
^
deep_spectre.c:156:5: warning: 'return' with a value, in function returning void
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

[asm]

The first thing I notice is you're attempting to use Python 2. I've only tested this with Python 3. See if switching to 3 fixes the issue. If not, I'm happy to dive into the syntax issues.