Falco fails to build from source because of issues with grpc cpp plugin and libcurl

[leodido]

What happened:

Trying to build Falco from source into an ArchLinux does not work. It results into complaints about grpc (implicit fallthrough) and libcurl issues with libidn2.

What you expected to happen:

Falco built from source.

How to reproduce it (as minimally and precisely as possible):

Assuming the current dev branch of Falco in the Falco directory, and a sibling directory containing the current dev branch of Sysdig, just follow the basic process to build Falco from source (eg. make build && cd build && cmake .. && make).

Anything else we need to know?:

Building process also complains about libpsl w.r.t. libcurl (when removing libidn2 issue compiling libcurl with --without-libidn2 flag).

Environment:

• Falco version (use falco --version):

0.15.3

• OS (e.g: cat /etc/os-release):

NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="0;36"
HOME_URL="https://www.archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://bugs.archlinux.org/"

• Kernel (e.g. uname -a):

Linux l13o1 5.1.4-arch1-1-ARCH #1 SMP PREEMPT Wed May 22 08:06:56 UTC 2019 x86_64 GNU/Linux

• Others:

gcc 8.3.0

[fntlnz]

/assign @fntlnz
/assign @leodido