Release 2.30.10 mingw static library dramatic size increase

[nichtsgames]

In the 2.30.9 release the file SDL2-devel-x.xx.x-mingw.zip\SDL2-x.xx.x\x86_64-w64-mingw32\lib\libSDL2.a had a size of 3.5 MB.
In the 2.30.10 and 2.30.11 releases the file has a size of 15 MB.
What's the cause of this increase?

[madebr]

I don't know how it was built before, but the build logs can be found here.
The static CFLAGS are:

-O2  -DUSING_GENERATED_CONFIG_H -Iinclude -I/tmp/tardir/SDL2-2.30.11/include -idirafter /tmp/tardir/SDL2-2.30.11/src/video/khronos  -DSDL_BUILD_MAJOR_VERSION=2 -DSDL_BUILD_MINOR_VERSION=30 -DSDL_BUILD_MICRO_VERSION=11 -mmmx -msse -Wall -Wno-unused-local-typedefs -fno-strict-aliasing -gdwarf-4 -Wdeclaration-after-statement -Werror=declaration-after-statement -MMD -M

The presence of -gdwarf-4 might explain the size, but it's added automatically by the configure script (configure command:

['configure', '--prefix=/tmp/tardir/SDL2-2.30.11/build-mingw/install-i686-w64-mingw32', '--includedir=${prefix}/include', '--libdir=${prefix}/lib', '--bindir=${prefix}/bin', '--exec-prefix=${prefix}/bin', '--host=i686-w64-mingw32', '--build=x86_64-none-linux-gnu', 'CFLAGS=-O2', 'CXXFLAGS=-O2', 'LDFLAGS=-Wl,-s']