@earlephilhower said:

MiniZ inflator alone takes 0x14b2 = 5298 bytes pf code when built with -Os.

I just patched in a naive version into the bootloader and updated the makefile to -Os and function/data_sections with gc-sections to drop everything that's not needed.

earle@server:~/Arduino/hardware/esp8266com/esp8266/bootloaders/eboot$ make
../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -std=gnu99 -Os -g -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mno-text-section-literals -I../../tools/sdk/include -mtext-section-literals -mlongcalls -nostdlib -fno-builtin -flto -Wl,-static -g -fdata-sections -ffunction-sections -Wl,--gc-sections   -c -o eboot.o eboot.c
eboot.c: In function 'copy_raw':
eboot.c:119:10: warning: type defaults to 'int' in declaration of 'status' [enabled by default]
     auto status = tinfl_decompress(&inflator, buffer, &in_bytes,
          ^
../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -std=gnu99 -Os -g -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mno-text-section-literals -I../../tools/sdk/include -mtext-section-literals -mlongcalls -nostdlib -fno-builtin -flto -Wl,-static -g -fdata-sections -ffunction-sections -Wl,--gc-sections   -c -o eboot_command.o eboot_command.c
../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -std=gnu99 -Os -g -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mno-text-section-literals -I../../tools/sdk/include -mtext-section-literals -mlongcalls -nostdlib -fno-builtin -flto -Wl,-static -g -fdata-sections -ffunction-sections -Wl,--gc-sections   -c -o miniz.o miniz.c
../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-ar cru eboot.a eboot.o eboot_command.o miniz.o
../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc -Teboot.ld -Wl,--gc-sections -nostdlib -Wl,--no-check-sections -umain eboot.a -o eboot.elf
earle@server:~/Arduino/hardware/esp8266com/esp8266/bootloaders/eboot$ objdump -t eboot.elf  | grep .text | sort -k1
4010f000 g       *ABS*	00000000 _text_start
4010f000 g       .text	00000000 _stext
4010f000 l    d  .text	00000000 .text
4010f010 g     F .text	00000079 print_version
4010f0a0 g     F .text	0000009b load_app_from_flash_raw
4010f168 g     F .text	00000114 copy_raw
4010f290 g     F .text	000000ea main
4010f380 g     F .text	00000038 crc_update
4010f3b8 g     F .text	00000019 eboot_command_calculate_crc32
4010f3e0 g     F .text	00000049 eboot_command_read
4010f430 g     F .text	00000014 eboot_command_clear
4010f4b8 g     F .text	0000129b tinfl_decompress
40110753 g       *ABS*	00000000 _text_end
40110753 g       .text	00000000 _etext
40110770 l     O .text	00000080 s_dist_base$2064
401107f0 l     O .text	00000080 s_dist_extra$2065
40110870 l     O .text	0000007c s_length_base$2062
401108ec l     O .text	0000007c s_length_extra$2063
40110968 l     O .text	00000013 s_length_dezigzag$2066
4011097c l     O .text	0000000c s_min_table_sizes$2067
40240000 g       *ABS*	00000000 _irom0_text_end
40240000 g       *ABS*	00000000 _irom0_text_start

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