Add FreeBSD to TravisCI

Implement the generation of Travis jobs for FreeBSD. The generated jobs
replicate the existing CirrusCI config.

scripts/freebsd/before_install.sh

@@ -0,0 +1,3 @@
+#!/bin/tcsh
+
+su -m root -c 'pkg install -y git'

scripts/freebsd/before_script.sh

@@ -0,0 +1,10 @@
+#!/bin/tcsh
+
+autoconf
+# We don't perfectly track freebsd stdlib.h definitions.  This is fine when
+# we count as a system header, but breaks otherwise, like during these
+# tests.
+./configure --with-jemalloc-prefix=ci_ ${COMPILER_FLAGS:+ CC="$CC $COMPILER_FLAGS" CXX="$CXX $COMPILER_FLAGS"} $CONFIGURE_FLAGS
+JE_NCPUS=`sysctl -n kern.smp.cpus`
+gmake -j${JE_NCPUS}
+gmake -j${JE_NCPUS} tests

scripts/freebsd/script.sh

@@ -0,0 +1,3 @@
+#!/bin/tcsh
+
+gmake check

scripts/gen_travis.py

@@ -7,6 +7,7 @@ from enum import Enum, auto
 LINUX = 'linux'
 OSX = 'osx'
 WINDOWS = 'windows'
+FREEBSD = 'freebsd'
 
 
 AMD64 = 'amd64'
@@ -140,6 +141,9 @@ all_unusuals = (compilers_unusual + feature_unusuals
 
 
 def get_extra_cflags(os, compiler):
+    if os == FREEBSD:
+        return []
+
     if os == WINDOWS:
         # For non-CL compilers under Windows (for now it's only MinGW-GCC),
         # -fcommon needs to be specified to correctly handle multiple
@@ -273,6 +277,19 @@ def generate_windows(arch):
     return generate_jobs(os, arch, (), max_unusual_opts, unusuals)
 
 
+def generate_freebsd(arch):
+    os = FREEBSD
+
+    max_unusual_opts = 4
+    unusuals = (
+        Option.as_configure_flag('--enable-debug'),
+        Option.as_configure_flag('--enable-prof --enable-prof-libunwind'),
+        Option.as_configure_flag('--with-lg-page=16 --with-malloc-conf=tcache:false'),
+        CROSS_COMPILE_32BIT,
+    )
+    return generate_jobs(os, arch, (), max_unusual_opts, unusuals)
+
+
 
 def get_manual_jobs():
     return """\
@@ -298,6 +315,8 @@ def main():
 
         #generate_windows(AMD64),
 
+        generate_freebsd(AMD64),
+
         get_manual_jobs()
     ))