getting compile error on code that was previously good before 1.52
code excerpt is small code to show error - ATOD i normally do is as shown except
often inside a function that is called by an interval timer - the fix i show may screw
up fancier ATOD servicing. below are code,error log, my very poor work around.
this all done ARD 1.8.5,TD 1.52, win7pro64, optimize method is a don't care - it
always gives the same error.

Code:
// TLC ADC BUG UNDER TD 1.52

#include <ADC.h>

  const int readPin = A10; // ADC0
  const int readPin2 = A11; // ADC1
  short unsigned int value1,value2;

ADC *adc = new ADC(); // adc object;

int main() {
  Serial.begin(300);
  pinMode(LED_BUILTIN, OUTPUT);
      digitalWrite(LED_BUILTIN, HIGH);
      delay(1000);
      digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
    pinMode(readPin, INPUT);
    pinMode(readPin2, INPUT);

    pinMode(A10, INPUT); //Diff Channel 0 Positive
    pinMode(A11, INPUT); //Diff Channel 0 Negative

    adc->adc0->setAveraging(1);
    adc->adc0->setResolution(12);
    adc->adc0->setConversionSpeed(ADC_CONVERSION_SPEED::VERY_HIGH_SPEED);
    adc->adc0->setSamplingSpeed(ADC_SAMPLING_SPEED::VERY_HIGH_SPEED);

   delay(1000);

mloop:

    value1 = adc->analogRead(readPin);
    value2 = adc->analogRead(readPin2);
    Serial.println (value1);
    Serial.println (value2);
    Serial.println ("  ");
    delay(5000);

goto mloop;
}
here is the error log

Code:
Arduino: 1.8.5 (Windows 7), TD: 1.52, Board: "Teensy LC, Serial, 48 MHz, Smallest Code with LTO, US English"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Dell\Documents\Arduino\libraries -fqbn=teensy:avr:teensyLC:usb=serial,speed=48,opt=oslto,keys=en-us -ide-version=10805 -build-path C:\Users\Dell\AppData\Local\Temp\arduino_build_618116 -warnings=none -build-cache C:\Users\Dell\AppData\Local\Temp\arduino_cache_937132 -verbose C:\Users\Dell\Documents\Arduino\libraries\arf1\arf1.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Dell\Documents\Arduino\libraries -fqbn=teensy:avr:teensyLC:usb=serial,speed=48,opt=oslto,keys=en-us -ide-version=10805 -build-path C:\Users\Dell\AppData\Local\Temp\arduino_build_618116 -warnings=none -build-cache C:\Users\Dell\AppData\Local\Temp\arduino_cache_937132 -verbose C:\Users\Dell\Documents\Arduino\libraries\arf1\arf1.ino
Using board 'teensyLC' from platform in folder: C:\Program Files (x86)\Arduino\hardware\teensy\avr
Using core 'teensy3' from platform in folder: C:\Program Files (x86)\Arduino\hardware\teensy\avr
Detecting libraries used...
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\sketch\arf1.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\sketch\arf1.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\ADC.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\ADC_Module.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\AnalogBufferDMA.cpp" -o "nul"
Generating function prototypes...
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w  -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\sketch\arf1.ino.cpp" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/precompile_helper" "C:\Program Files (x86)\Arduino\hardware\teensy\avr/cores/teensy3" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116" "C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -x c++-header -Os -flto -fno-fat-lto-objects --specs=nano.specs -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr/cores/teensy3" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch/Arduino.h" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch/Arduino.h.gch"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -c -Os -flto -fno-fat-lto-objects --specs=nano.specs -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\sketch\arf1.ino.cpp" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\sketch\arf1.ino.cpp.o"
Compiling libraries...
Compiling library "ADC"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -c -Os -flto -fno-fat-lto-objects --specs=nano.specs -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\ADC.cpp" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\libraries\ADC\ADC.cpp.o"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -c -Os -flto -fno-fat-lto-objects --specs=nano.specs -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\ADC_Module.cpp" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\libraries\ADC\ADC_Module.cpp.o"
"C:\Program Files (x86)\Arduino\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -c -Os -flto -fno-fat-lto-objects --specs=nano.specs -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -fno-exceptions -fpermissive -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m0plus -fsingle-precision-constant -D__MKL26Z64__ -DTEENSYDUINO=152 -DARDUINO=10805 -DARDUINO_TEENSYLC -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Users\Dell\AppData\Local\Temp\arduino_build_618116/pch" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3" "-IC:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC" "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\AnalogBufferDMA.cpp" -o "C:\Users\Dell\AppData\Local\Temp\arduino_build_618116\libraries\ADC\AnalogBufferDMA.cpp.o"
C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\AnalogBufferDMA.cpp: In member function 'void AnalogBufferDMA::init(ADC*, int8_t)':

C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC\AnalogBufferDMA.cpp:163:8: error: 'class ADC' has no member named 'enableDMA'

   adc->enableDMA(adc_num);

        ^

Using library ADC at version 8.0 in folder: C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\ADC 
Error compiling for board Teensy LC.
and here is the poor work around - the commented ... adc->enableDMA(adc_num)... is actually line 163
in the file AnalogBufferDMA.cpp

Code:
#else
  // Kinetisl (TLC)
  // setup a DMA Channel.
  // Now lets see the different things that RingbufferDMA setup for us before
  _dmachannel_adc.source((volatile uint16_t&)(SOURCE_ADC_0));;
  _dmachannel_adc.destinationBuffer((uint16_t*)_buffer1, _buffer1_count * 2); // 2*b_size is necessary for some reason
  _dmachannel_adc.disableOnCompletion();    // ISR will hae to restart with other buffer
  _dmachannel_adc.interruptAtCompletion(); //interruptAtHalf or interruptAtCompletion
  _activeObjectPerADC[0] = this;
  _dmachannel_adc.attachInterrupt(&adc_0_dmaISR);
  _dmachannel_adc.triggerAtHardwareEvent(DMAMUX_ADC_0); // start DMA channel when ADC finishes a conversion
  _dmachannel_adc.enable();

  adc->startContinuous(adc_num);
//  adc->enableDMA(adc_num);
#ifdef DEBUG_DUMP_DATA
  dumpDMA_TCD(&_dmachannel_adc);
#endif

#endif