Arduino-UNO, Rev.3, and building examples included w/ IDE's.
All IDE installations were done to Desktop folders w/ zip file non-admin procedure.
IDE 1.0.6 (installed 1/2/2015) will verify/compile on my win7 home ed. w/warnings by preference vebose option during compiling.
IDE 1.6.4 (installed 5/29/2015)won't finish compiling on same system w/ no warnings, but w/ compiling error, by preference verbose option during compiling. It appears some of the missing files are .eep, .elp and .hex extensions.
The last section from stdout:
C:\Users\Owner\Desktop\arduino-1.6.4\hardware\tools\avr/bin/avr-gcc -w -Os -Wl,--gc-sections -mmcu=atmega328p -o C:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp/master_reader.cpp.elf C:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp\master_reader.cpp.o C:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp\Wire\Wire.cpp.o C:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp\Wire\utility\twi.c.o C:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp/core.a -LC:\Users\Owner\AppData\Local\Temp\build5014785536424502555.tmp -lm
The contents of stderr:
c:/users/owner/desktop/arduino-1.6.4/hardware/tools/avr/bin/../lib/gcc/avr/4.8.1/../../../../avr/lib/avr5\libc.a: file not recognized: File format not recognized
collect2.exe: error: ld returned 1 exit status
Error compiling.
IDE 1.6.4. will install and run on my winxp service pack 3 home ed., w/out warnings or errors, seemingly flawlessly. Trying compatibility mode in win7 to winxp for IDE 1.6.4 did not succeed in compiling or any change in output to stderr and stdout.
The differences in the files in the build folders is as mentioned, no .eep, .elp, or .hex files in 1.6.4, and additionally;
exclusive to 1.6.4 build are; abi., buildprefs.txt, HardwareSerial0.,1.,2.,3., hooks.;
exclusive to 1.0.6 build are; malloc, realloc;
common to both are; HardwareSerial., and others that tally to the same number and names in both build folders.
I haven't noticed any buildprefs.txt file generated w/ 1.0.6; have noticed preferences.txt files residing in Roaming/Arduino and Roaming/Arduino15 folders for 1.0.6 and 1.6.4, respectively.
I suspect the preferences.txt files are always important for any particular version of IDE.
Is there anything obvious in these observations to suspect possible solutions in view of the present fact that 1.6.4 will verify/compile on my winxp and not on my win7?
Additional info will be provided if specified.