Fix improper handling of CFLAGS and LDFLAGS throughout the build system.
Also remove hardcoded debug flags that prevented production builds
without symbols.
Problems:
---------
1. CFLAGS/LDFLAGS handling:
The build system was using `CFLAGS +=` and `LDFLAGS +=` to append
package-specific flags, which modifies the user's environment variables
instead of keeping package and user flags separate. This caused:
- User-specified optimization levels being overridden by package defaults
- Inability to properly override flags at configure or make time
- Problems with cross-compilation and embedded toolchains
2. Hardcoded -g flags:
Debug symbols (-g) were hardcoded in several Makefiles, forcing debug
symbols in all builds including production. This caused:
- Larger binary sizes (library and tools)
- No way to build without debug symbols
- Conflicts with user's debug level preferences (-g1, -g2, -g3)
- Redundancy with configure options (--enable-debug-build)
Solutions:
----------
1. Implement proper CFLAGS/LDFLAGS separation using AM_CFLAGS/AM_LDFLAGS:
- Added `CFLAGS = @CFLAGS@` to preserve configure-time flags
- Added `LDFLAGS = @LDFLAGS@` to preserve configure-time flags
- Changed `CFLAGS +=` to `AM_CFLAGS =` and `AM_CFLAGS +=`
- Changed `LDFLAGS +=` to `AM_LDFLAGS =` and `AM_LDFLAGS +=`
- Updated compilation rules: $(CC) $(AM_CFLAGS) $(CFLAGS) ...
- Updated linking rules: $(CC) ... $(AM_LDFLAGS) $(LDFLAGS) ...
2. Remove all hardcoded -g flags from Makefiles:
- Debug symbols now controlled via configure (--enable-debug-build)
or user CFLAGS (e.g., CFLAGS="-g3")
Flag ordering ensures:
- Package flags come first (e.g., -O2, -fPIC)
- User flags come after and can override (e.g., -O3)
- Last flag wins for conflicting options
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude <noreply@anthropic.com>
This commit implements comprehensive improvements to the nDPI build system
to enhance portability, enable parallel testing, and ensure reliable
out-of-tree (VPATH) builds across all platforms.
Changes:
1. Optimize library linking order (configure.ac, all Makefiles)
- Reorder ADDITIONAL_LIBS to follow proper dependency hierarchy
- Move low-level libraries (libm) to end of link line
- Ensures compatibility with --as-needed linker flag
- Improves LTO and static linking support
2. Fix VPATH build dependencies (all Makefiles)
- Add explicit dependencies on generated headers (ndpi_config.h, ndpi_define.h)
- Prevents race conditions in parallel builds (make -j)
- Ensures headers exist before compilation starts
3. Replace mkdir -p with portable $(MKDIR_P) macro
4. Enable parallel test execution (configure.ac)
- Add 'parallel-tests' option to AM_INIT_AUTOMAKE
- Allows test suites to run concurrently during 'make check'
5. Add defensive .NOTPARALLEL directive (Makefile.am)
- Prevents race conditions if 'make -j clean distclean' is run
6. Fix clean target completeness (src/lib/Makefile.in)
- Remove all .so symlinks (libndpi.so, libndpi.so.N)
- Add cleanup for Windows DLL files (*.dll)
- Explicitly remove versioned shared libraries
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Ivan Nardi <nardi.ivan@gmail.com>
Initial work to support out-of-tree builds
```
./autogen.sh
mkdir build
cd build
../configure
make
make check
```
IMPORTANT: `autogen.sh` doesn't call `configure` automatically anymore!!
You have to do: `./autogen.sh && ./configure --$OPTIONS`.
A little bit annoying but the pattern `autogen && configure && make` is
very common on Linux.
Known issues:
* `make doc` doesn't work in out-of-tree builds, yet
* Windows/MinGW/DPDK (out-of-tree) builds have not been tested, so it is unlikely they work
See: #2992
* CI fixes
* some build systems do not like that (e.g. OpenWrt)
* fixed some rrdtool related build warnings/errors
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
This fixes some build/test issues resulting when using tarballs.
* nDPI uses autotools (especially autoconf) in a wrong way, see #1163
Signed-off-by: lns <matzeton@googlemail.com>
