Trying to compile libinsp on Alpine 3.19 results in error: 'int64_t' has not been declared

[Quarky9]

Describe the bug
Trying to build falco from source on latest Alpine 3.19 fails in libinsp with

/home/alpine/kubezero/falco/src/falco-0.37.1/build/falcosecurity-libs-repo/falcosecurity-libs-prefix/src/falcosecurity-libs/userspace/libsinsp/procfs_utils.h:37:28: error: 'int64_t' has not been declared
   37 |         bool in_own_ns_mnt(int64_t pid) const;
      |                            ^~~~~~~
/home/alpine/kubezero/falco/src/falco-0.37.1/build/falcosecurity-libs-repo/falcosecurity-libs-prefix/src/falcosecurity-libs/userspace/libsinsp/procfs_utils.h:39:34: error: 'int64_t' has not been declared
   39 |         std::string get_pid_root(int64_t pid) const
      |                                  ^~~~~~~
/home/alpine/kubezero/falco/src/falco-0.37.1/build/falcosecurity-libs-repo/falcosecurity-libs-prefix/src/falcosecurity-libs/userspace/libsinsp/procfs_utils.h:47:9: error: 'int64_t' does not name a type
   47 |         int64_t m_host_init_root_inode{-1};
      |         ^~~~~~~
/home/alpine/kubezero/falco/src/falco-0.37.1/build/falcosecurity-libs-repo/falcosecurity-libs-prefix/src/falcosecurity-libs/userspace/libsinsp/procfs_utils.h:4:1: note: 'int64_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
    3 | #include <istream>
  +++ |+#include <cstdint>
    4 | #include <string>```


**How to reproduce it**
MINIMAL_BUILD=On

**Expected behaviour**
Build process finishes ;-)

**Environment**
 Alpine 3.19
Falco 0.37.1

** Hint **
Looking at the compiler hint of missing `#include <cstdint>` and confirming that it is already included in various other places makes me believe that might be the root cause here ?

[Quarky9]

Quick update ... after monkey patching userspace/libsinsp/procfs_utils.h with the compiler suggested "include" the build finishes just fine ...

[FedeDP]

Hi! Thanks for spotting this issue! Do you mind to open a PR to fix it?

[Quarky9]

Done see #1742