new board generator option: --nofloat (#4232)

platform.txt

@@ -21,6 +21,7 @@ build.lwip_lib=-llwip_gcc
 build.lwip_include=lwip/include
 build.lwip_flags=-DLWIP_OPEN_SRC
 
+build.float=-u _printf_float -u _scanf_float
 build.led=
 
 compiler.path={runtime.tools.xtensa-lx106-elf-gcc.path}/bin/
@@ -34,7 +35,7 @@ compiler.c.flags=-c {compiler.warning_flags} -Os -g -Wpointer-arith -Wno-implici
 compiler.S.cmd=xtensa-lx106-elf-gcc
 compiler.S.flags=-c -g -x assembler-with-cpp -MMD -mlongcalls
 
-compiler.c.elf.flags=-g {compiler.warning_flags} -Os -nostdlib -Wl,--no-check-sections -u call_user_start -u _printf_float -u _scanf_float -Wl,-static "-L{compiler.sdk.path}/lib" "-L{compiler.sdk.path}/ld" "-L{compiler.libc.path}/lib" "-T{build.flash_ld}" -Wl,--gc-sections -Wl,-wrap,system_restart_local -Wl,-wrap,spi_flash_read
+compiler.c.elf.flags=-g {compiler.warning_flags} -Os -nostdlib -Wl,--no-check-sections -u call_user_start {build.float} -Wl,-static "-L{compiler.sdk.path}/lib" "-L{compiler.sdk.path}/ld" "-L{compiler.libc.path}/lib" "-T{build.flash_ld}" -Wl,--gc-sections -Wl,-wrap,system_restart_local -Wl,-wrap,spi_flash_read
 
 compiler.c.elf.cmd=xtensa-lx106-elf-gcc
 compiler.c.elf.libs=-lhal -lphy -lpp -lnet80211 {build.lwip_lib} -lwpa -lcrypto -lmain -lwps -laxtls -lespnow -lsmartconfig -lairkiss -lmesh -lwpa2 -lstdc++ -lm -lc -lgcc

tools/boards.txt.py

@@ -924,7 +924,6 @@ def all_debug ():
     listcomb = [ 'SSL', 'TLS_MEM', 'HTTP_CLIENT', 'HTTP_SERVER' ]
     listnocomb = [ 'CORE', 'WIFI', 'HTTP_UPDATE', 'UPDATER', 'OTA' ]
     listsingle = [ 'NoAssert-NDEBUG' ]
-    if not premerge:
     listnocomb += [ 'OOM -include "umm_malloc/umm_malloc_cfg.h"' ]
     options = combn(listcomb)
     options += comb1(listnocomb)
@@ -1091,9 +1090,6 @@ def all_boards ():
 
     macros.update(all_flash_size())
     macros.update(all_debug())
-    if premerge:
-        macros.update({ 'led': { } })
-    else:
     macros.update(led(led_default, led_max))
 
     print '#'
@@ -1148,6 +1144,9 @@ def all_boards ():
                 if not ('opts' in board) or not (optname in board['opts']):
                     print id + optname + '=' + macros[block][optname]
 
+        if nofloat:
+            print id + '.build.float='
+
         print ''
 
     if boardsgen:
@@ -1243,8 +1242,8 @@ def usage (name,ret):
     print "	--led			- preferred default builtin led for generic boards (default %d)" % led_default
     print "	--board b		- board to modify:"
     print "		--speed	s	- change default serial speed"
-    print "	--premerge		- no OOM debug option, no led menu"
     print "	--customspeed s		- new serial speed for all boards"
+    print "	--nofloat		- disable float support in printf/scanf"
     print ""
     print "	mandatory option (at least one):"
     print ""
@@ -1285,7 +1284,7 @@ lwip = 2
 default_speed = '115'
 led_default = 2
 led_max = 16
-premerge = False
+nofloat = False
 ldgen = False
 ldshow = False
 boardsgen = False
@@ -1300,7 +1299,7 @@ customspeeds = []
 
 try:
     opts, args = getopt.getopt(sys.argv[1:], "h",
-        [ "help", "premerge", "lwip=", "led=", "speed=", "board=", "customspeed=",
+        [ "help", "lwip=", "led=", "speed=", "board=", "customspeed=", "nofloat",
           "ld", "ldgen", "boards", "boardsgen", "package", "packagegen", "doc", "docgen" ])
 except getopt.GetoptError as err:
     print str(err)  # will print something like "option -a not recognized"
@@ -1314,9 +1313,6 @@ for o, a in opts:
     if o in ("-h", "--help"):
         usage(sys.argv[0], 0)
 
-    elif o in ("--premerge"):
-        premerge = True
-
     elif o in ("--lwip"):
         lwip = a
 
@@ -1343,6 +1339,9 @@ for o, a in opts:
             usage(sys.argv[0], 1)
         boards[board]['serial'] = a
 
+    elif o in ("--nofloat"):
+        nofloat=True
+
     elif o in ("--ldshow"):
         ldshow = True