Fails to compile on FreeBSD

[ghost]

Making all in smolscale
/bin/sh ../../../libtool --tag=CC --mode=compile cc -DHAVE_CONFIG_H -I. -I../../.. -Wall -Wextra -Wmissing-prototypes -fvisibility=hidden -DSMOL_WITH_AVX2 -g -O2 -MT libsmolscale_la-smolscale.lo -MD -MP -MF .deps/libsmolscale_la-smolscale.Tpo -c -o libsmolscale_la-smolscale.lo test -f 'smolscale.c' || echo './'smolscale.c
libtool: compile: cc -DHAVE_CONFIG_H -I. -I../../.. -Wall -Wextra -Wmissing-prototypes -fvisibility=hidden -DSMOL_WITH_AVX2 -g -O2 -MT libsmolscale_la-smolscale.lo -MD -MP -MF .deps/libsmolscale_la-smolscale.Tpo -c smolscale.c -fPIC -DPIC -o .libs/libsmolscale_la-smolscale.o
smolscale.c:8:10: fatal error: 'alloca.h' file not found
#include <alloca.h> /* alloca */
^~~~~~~~~~
1 error generated.
*** Error code 1

Stop.
make[4]: stopped in /usr/home/gregf/chafa/chafa/internal/smolscale
*** Error code 1

Stop.
make[3]: stopped in /usr/home/gregf/chafa/chafa/internal
*** Error code 1

Stop.
make[2]: stopped in /usr/home/gregf/chafa/chafa
*** Error code 1

Stop.
make[1]: stopped in /usr/home/gregf/chafa
*** Error code 1

Stop.
make: stopped in /usr/home/gregf/chafa

[hpjansson]

Fixed in master. Thanks for reporting this!