Build fails with option USE_INTERNAL_FPCONV

[michael0710]

Observed behaviour

When lua-cjson is built with luarocks, the build fails if the option USE_INTERNAL_FPCONV is provided in the rockspec file.

The error message reads as follows:

fpconv.c:205:6: error: redefinition of 'fpconv_init'
 void fpconv_init(void)
      ^~~~~~~~~~~
In file included from fpconv.c:36:
fpconv.h:19:20: note: previous definition of 'fpconv_init' was here
 static inline void fpconv_init()
                    ^~~~~~~~~~~

Error: Build error: Failed compiling object fpconv.o

Steps to reproduce

1. Download the source
2. Alter the .rockspec file in line 54 by adding the "USE_INTERNAL_FPCONV" option
3. Run the luarocks make command in the source directory

Platform information

luarocks 3.12.2
Lua 5.4.8
OS: Microsoft Windows 11 Pro
OS Version: 10.0.26100 Build 26100
Hardware: x64

As the fpconv_init() function is defined with the keywords static inline if USE_INTERNAL_FPCONV is defined in fpconv.h, I think the definition of the function in fpconv.c shall be enclosed in an #ifndef USE_INTERNAL_FPCONV block.